Why did communism always turn into a kind of dictatorship?
Afaik this happened with every single instance of a communist country. Communism seems like a pretty good idea on the surface, but then why does it always become autocratic?
Attempts to implement communism at the scale of a nation state have always involved significant concentration of power. It may be impossible to do otherwise.
Power corrupts, and concentrations of power attract the corrupt.
Marx opined that certain material conditions had to be achieved before a socialist state could be successfully made. These material conditions include bourgeois capitalist democracy. Marx explicitly said that capitalism forges the tools with which it will be destroyed.
A certain subset of communists known as Marxist-Leninists decided that bourgeois capitalist democracy wasn't necessary if you just oppressed people REALLY hard, you could skip straight to a socialist state. And because they 'succeeded' in overthrowing traditional Marxists in 1917 Russia and getting the full power of a massive country to spread their ideology, they've had bootlickers calling their particular brand of insanity the only 'real' form of communism ever since.
When we think of 'communist' countries, we think of Marxist-Leninist countries which tried to jump from feudal societies to socialist societies, which, quite obviously from the results, doesn't work. Doesn't stop the cultists from licking boots, of course.
Centralization of decision-making. It's ironic actually.
One of the main problems of capitalism that Marx described is the separation between labor and ownership. All the talk about "means of production".
Communism actually makes it worse. In capitalism yes you have the owners who have all the control and reap all the benefits, but you have many capitalists competing, so the power is kinda distributed inside the capitalist class. The way communism was always implemented is through a communist party and state control of the economy.
You get an even smaller group of people controlling the means of production. It amplifies exactly the main problem of capitalism by creating a very hierarchical class society where the party leadership takes a role of what is almost "nobility".
Chile was a communist country and didnt become autocratic because of it, the US murdered their democratically elected president then planted a dictator in his place. So my guess is it doesn't always end that way on it's own. Russia speedran the capitalism to fascim transition to, it's been capitalist since 1991, sham elections since 2005, so they're not a good example of any kind of economic or government system. China has a tight grip on their population but don't let the propaganda distract you from the fact that the US is just as much a surveillance state as China with the one exception being how much China micromanages it's people when they leave the country, but I wouldn't bet against America keeping tabs on expats the same way it was found out that America was spying on its allies in the EU.
I think this question ignores mountains of contexts in an attemtp at reducing a problem into one facet.
Because most real-world implementations of communism was the idea that a "vanguard party" would excercise total control over the country. The idea is eventually the state would "wither away" after communism is acheived.
Yea imagine how that goes. Once a party gets total power, they ain't giving it up, that's the problem.
Ideologically, Leninism supported vanguardism, a variation on Marxism that said that the Communist party was supposed to drag the early-20th-century proletariat into the revolution, instead of waiting for late capitalism where the proletariat would (according to Marx) naturally become revolutionary. This, and the notion of "false consciousness", authorized Communist parties to go against the expressed (democratic) will of the proletariat, on the theory that the proletariat's judgment was clouded by false consciousness, while still claiming to act in the interests of the proletariat.
Basically, "we (the party) know better than you (the people)" was ingrained into Leninism from the beginning, and the major communist revolutions either were or became Leninist. Maoism was a branch off of Leninism as well.
Equating all socialism with the authoritarian regimes of the 20th century oversimplifies a complex political tradition.
Dictatorial tendencies are not intrinsic to socialism but are contingent on specific historical and political contexts.
Russia: The Bolsheviks' turn to authoritarianism was partly due to the civil war, external invasions, and a lack of democratic traditions. These circumstances led to the consolidation of power to preserve the revolution, not as an inevitable feature of socialist theory.
In other contexts, socialist movements (e.g., in Scandinavia) have successfully implemented social democratic policies without authoritarianism.
The role of individual leaders and political choices in shaping socialist experiments. Figures like Lenin and Stalin made decisions that prioritized centralized control, which deviated from the principles of worker self-management and democratic participation.
These deviations were not a necessary outcome of socialism but reflected the particular decisions and dynamics of those historical moments. So a small sample size of major socialist states and people cloud judgement.
External hostility often pushed socialist regimes toward authoritarian measures. For example, the USSR faced significant opposition from capitalist countries, which influenced its militarization and political centralization. This external pressure created a siege mentality that undermined the potential for democratic governance.
Democratic socialism has thrived in various countries, showing that socialism can coexist with democratic principles. Examples include the welfare states of Scandinavia, where socialism has enhanced equality and social welfare without undermining political freedoms.
There's a lot of confusion in these comments regarding Marxist theory, presumably from people who haven't actually engaged with the source material, so I want to clarify something I see repeated frequently in this thread with little pushback. The Marxist theory of the State is not the same as the Anarchist, nor the liberal. Marx defined the State as a tool of class oppression.
The reason I state this is because there's a confused notion that Marxists think there should be
An unaccountable Vanguard
The Vanguard does stuff. At a certain arbitrary point the Vanguard dissolves and society embraces full horizontalism
I'll address these in order. First, the Vanguard is in no-way meant to be unaccountable, nor a small group of elites, but the most politically active, practiced, and experienced among the proletariat elected by the rest of the proletariat. The concept of the "Mass Line" is crucial to Marxist theory, that is, the insepperability of the Vanguard from the masses. If this line is broken, the Vanguard loses legitimacy and ceases to be effective, whether it falls into Tailism or Commandism. These tendencies must be fought daily, and don't simply vanish by decree.
Secondly, the basis for Marxian Communism is the developmental trends of Capitalism. Markets start highly decentralized, but gradually the better Capitalists outcompete and grow, and as they grow they must develop new methods of accounting and planning. Capital concentrates in fewer and fewer hands, yet socialization increases as these conglomerations begin to reach monstrous heights and require incredibly complex planning. The development of such methods and tools is the real, scientific foundation of Public Ownership and Central Planning.
Continuing, once the Proletariat takes control and creates a Proletarian State, the Proletariat, the more experienced among them the Vanguard, gradually wrests from the bourgeoisie their Capital with respect to that industries and sectors that have sufficiently developed. This process continues until all Capital has been folded into the Public Sector, at which point laws meant for restraining the bourgeoisie begin to become superfluous and "die out." The Vanguard doesn't "dissolve" or "cede power," but itself as a concept also dies out, as over time new methods of planning and infrastructure make its role more superfluous. Classes in general are abolished once all property is in the Public Sector, and as such the State no longer exists either, as there isn't a class to oppress.
This is why Marxists say the State "withers away." It isn't about demolishing itself, but that Marx and Engels had a particular vision of what the State even is, and why they said it could not be abolished overnight.
Hope that helped! As a side note, asking this on Lemmy.world, an anti-Marxist instance, is only ever going to get you answers biased in that direction. I suggest asking on other instances as well to get a more complete view.
Because one of, if not the main purpose of money is to provide a decentralized way of transferring information about economic needs and capabilities. Without that mechanism in place, the only way of determining where goods can be created and where they need to go (a massive problem that it is a daily miracle we don't generally have to deal with) is by an overbearing authoritarian state.
It's the opportunist problem. We see this throughout rebellions in history, not just when communist countries are made. Basically, anytime conditions are bad enough for the people to demand change it's really easy for someone to trade on their ignorance. They can push policies that sound like they'll help but really consolidate power. And if anyone speaks up, they're an enemy of the people.
For a non Communist example of this in modern history check out the French Revolution.
Because communism is the end goal, but one of the transitionary phases is the dictatorship of the proletariat , where a representative of the people is given sweeping power to prevent a counterrevolution from the bourgeoisie.
But that kind of power is hard to give up; foreign powers are trying to sew discord, and it's really convenient to get stuff done. It's ok, you're one of the good guys anyways, right?
So communism never really makes it past that stage
Most countries we would label as communist didn't form as Marx expected. Marx expected relatively advanced nations to revolt and claim control over capital. Instead, most Communist revolutions occurred in generally despotic and less developed countries.
When times are good, the government can use the material improvement of people's lives as a reason to be in power. However, if times stop being good, the government becomes more overtly autocratic to maintain control.
Because there was never anything communist about these states in any way whatsoever.
Communism is a state (as in a social, political and economic condition, not a government). None of these states ever reached this condition, and, therefore, was never communist. And, one could argue, that their development literally went the opposite way to what could be called communist with a straight face. As the anarchist Bakunin famously said, "the people's boot is still a boot."
This is why the Maoist-types call this shit "democratic centralism," which is essentially just double-speak for "what the party says goes."
This does not make the idea of communism invalid - but it's still as perfectly vague as ever, unfortunately.
My take on it from the theory is that most advocates say that you have to go through a period of single party socialism before the state somewhat fades away and it becomes communism.
I don't think it's actually possible in reality for a single party state to cede the power back to the people afterwards.
They had no communist intentions to begin with. The benefits of communism are just an easy way to market any nefarious movement with anticommunist intentions
The core principles of communism are basically an antithesis of these authoritarians/totalitarians/autocratics/oligarchs (how ever you want to describe them). Such a shift isn't accidental
Countries with a strong history of authoritarian leadership, which continued under communism but with a fig leaf of public support. Kind of like how the US was formed as a democracy, but only for male white land owners who were already the ruling class.
The governmental structure has an impact on culture, but it doesn't magically override existing social connections and norms. The people really did elect Putin before he consolidated power and turned it into completely sham elections. The communist party in China was originally what the people wanted before being turned into an authoritarian regime.
It isn't like this is that unique to the countries that adopted communism. Many large countries, including western democracies, end up leaning into authoritarian tendencies over time because central leadership structures tend to encourage the leadership styles of 'strong men'. If the culture isn't there to hold those that abuse their power accountable, that country will slide into authoritarianism over time.
Personally, I don't see communism ever scaling well above maybe a few hundred people because the more people that someone doesn't know is involved the harder it is for the whole to feel like a community. Democracy has a similar scaling problem, but it doesn't lean into authoritarianism as fast. yeah,
The same threat that democracy faces, it's vulnerable to charismatic people who become entrenched and draconian. I'm not convinced it can ever work without some competing force that resists the consolidation of power, such as highly educated and politically involved populace.
Communism probably works at smaller scales but for larger populations it would only be feasible when the leadership is benevolent. A robot administrator would be an interesting experiment.
Someone please correct me if I am misunderstaning or mischaracterizing this ideology:
From my limited understanding (because enthusiastic support for mass executions of anti-communists caused me to totally abandon it as a viable ideology) Lenin posited that it was necessary to violently rid the world of capitalist tendencies by force in order to protect the slow transition to the collectivist utopia he envisioned. This is my biggest problem with Marxism....or perhaps the brand of Marxism that has been adopted.
My background: I consider myself a libertarian socialist at the moment. I wholeheartedly agree that capitalism will kill our planet but I am not willing to support an autoritarian regime that promises to execute or imprison its critics for life (which both the US and China do ALL THE TIME). From my limited understanding, Marx didn't start there but was "radicalized" into firmly believing that the only way to get capitalists to go along with his plan is to eliminate them from society. The authoritarian behaviour reportedly came about from a very real need to prevent capitalists from meddling in order to protect their consumer ideology throughout the world.
If I am wrong, the people on hexbear have also misunderstood it. They believe that the only way to the utopia they want is through China's authoritarian methods. Their support for China is about as pervasive there as lemmy.world's support for DLC style neoliberal globalism.
I don't think that is exclusive to communism. I rather assume that this has more to do with how the government is structured. Long-running politicians tend to being more open to corruption.
I can easily see Trump going the same way. He has assembled enough power within the system to break it from within like most dictators did.
OP how much of today's markets and politics are definited by Oligarchs and the rich? Can you really say that a plutocracy isn't it's own kind of dictatorship?
Even more so, many westerners have been fooled by culture to think this is natural, inevitable, and good.
In terms of per capita rates, the Irish Catholic Church was incarcerating more of Irelands population than Stalin did to Russia during his reign.
Just two companies; The British East India company and the Belgian Rubber plantations of the Congo killed more people than Stalin or Mao (especially if you factor out the deaths from Lysenkoism, which wasn't a part of communism).
So early Capitalism and Colonialism killed far more than Communist dictatorships have....
And finally there is this to say - Communism is an economic system designed to interrupt plutocratic rule. It's not a governmental system of elections and checls and balances....
...and if we are to be the most up to date with this: China and Vietnam have Socialist Oriented Market Economies. The one in Vietnam, has almost eliminated homelessness entirely. Is that a dictatorship compared to the woes of the west's housing crisises?
Early systems from both economic models - Capitalism/Colonialism and Communism - both had events of mass killings. Both have seen dictatorships... You only focus on these things in the Communist model, because of your background. Likewise, someone from China or North Korea might hear more about the famines, deaths and genocides of the Capitalist and Colonial corporations I've mentioned above.
P.S. Are Cancer deaths from chemicals Capitalists kept on the "safe" list indicative of a dictatorship by the wealthy? What about the deaths and famines from weather disturbances in the climate? If we're counting the famines under Communism, then why not these things to? It's because of a hidden Western ideology/indoctrination culture.
Because, at a high level, communism requires that a leader or group of leaders get things on track and then give up all of their power over time. Instead, the type of people who tend to lead revolutions are the same type of people who are unlikely to want to give up power and instead end up wanting more power. So no true communism has ever existed because it never gets to that phase.
The vanguard party is essentially an oligarchy. It chooses its own successors, and we’re supposed to trust that they are too smart and on the lookout for the populace to not abuse power selfishly. A core tenet of anarchism is that while people may hold authority, nobody should hold positions of power.
Though I would say that while quite corrupt, one-party, and authoritarian, Cuba is a lot more democratic than people think
One thing I'll add that I haven't seen mentioned is communisms relative weakness in the propaganda department. If you look at democracy as a bunch of competing interest groups i.e. parties trying to win the masses over to there side to win, then there main tool / weapon is information that will make the opposition look bad and your side look good, i.e. propaganda. Good propaganda requires intimate knowledge of people's desires and a knowledge of how to shape those desires to the benefit of your program. Capitalism is very good at this due to competition forcing them to better understand there customer so they can sell them more. Capitalism creates great salesman which is fundamentally what you need to create good propaganda. You can see this expertise most plainly in advertising pushing the message that consumption is good, fulfilling and will make you happy.
This expertise combined with the large amount of resources capital can Marshall to push there message makes electoral politics extremely difficult for communism or any program that goes against consumption like environmentalism. Even if you completely eliminate capital and it's control over media in one nation foreign actors will still come in using the same expertise and resources to try and bring back capitalism. So since communists can't compete electorally with a free press they go towards autocracy to keep power.
Even popular egalitarian movements face significant resistance to social and economic change. This will not only come from elites who stand to loose from social change, but also from common people who for one reason or another oppose that which benefits themselves. Beyond the social and economic connections to the elite, the social inertia to change is on the side of capital.
The solution, from Bolivar to Lenin to Castro has been to force the people to be free because you can't have socialist democracy if people would vote to return to capitalism or colonialism.
Leftists have long talked about "educating" the populace, but this is another tempting avenue for creeping totalitarianism. It's not like capital is innocent of coercion, but so long as it accommodates the ignorant, it has an overwhelming advantage over a system that requires an improved humanity.
I suppose we'll iron this out. Remember that the social anchors for capital are hundreds of years old and have their roots in feudalism and aristocracy. Socialism is young and her sins are close in our minds not because their failures are extraordinary but because they're recent.
Well it didn't happen in every case. In the UK socialists became a big faction within the post war labour party and created the NHS. Almost every other country in Europe has a similar story with the creation of their own healthcare systems. Russia and China have never been democracies at any point in their history so maybe that has more to do with it than socialist and communist ideas.
So to begin with all communism so far has never been democratically voted in as far as I know and pretty much starts with an ideological military government that then needs to transition back to democracy.
Many do transition to a one party system where all democracy is contained within the party and essentially becomes a "primaries only" type.
Then slowly over time power consolidations and purges bring it towards a dictatorship because there are no checks and balances against it.
So it seems to me that the only way to get to the ideological communism is through democracy and constitutional changes, proportional representation and coalition governments that don't allow any one toxic pernon to consolidate power.
Many informed responses already so I'll add my uninformed opinion.
Political change has never occurred in a vacuum. Communism is a direct threat to capitalism. So the US capitalists will do everything in their power to undermine and disrupt communism.
Realistically anybody who can take control of a country is a bit of a ruthless cunt, and ones that take over in an armed uprising especially so.
It's not a massive shock that some of them don't want to give up the crown once they've got it.
Even in so called democracies, we basically get to choose our "king" from a heavily vetted list. It ain't going to be people like me and you rising to the top.
Simple. Power corrupts. Even with a socialist government there is always gonna be power hungry people seeking authority over their constituents. Think of the majority as sheep, comfortable with being herded and the power hungerers as the wolves slavering to enslave them.
Because people suck ass, and to successfully go from capitalism to socialism and then to communism, you need a whole population that puts the needs of the many above their own selfish desires. It's not impossible, but it's gonna be hard to truly accomplish.
The main reason is the Monroe Doctrine. The United States literally made it its business to terrorize any "communist" state, even if it's democratically elected. That breeds the conditions for paranoia, the desire for increased protection, etc.
But, in the context of endgame scenarios against dictators, the main factor usually is how the military responds, especially when asked to brutalize the population. If the military parts ways, they may start a coup of their own or they may (rarely) defer to the population.
So, by extrapolation, I imagine it's also true here: other powerful factions allow it because it opens opportunities for them to garner more power too. Business execs, politicians, and military officials alike are duking it out for influence amongst themselves as well.
I'd ended up having a conversation with an archivist about the somewhat related question of "What was the Soviet Union's history of itself, absent the editorializing that the rest of the world has been doing?"
For example, Tamim Ansary wrote Destiny Disrupted: A History of the World through Islamic Eyes that explained a lot of things about the middle east through that sort of lens, so I was hoping that someone would write a history of the USSR in a similar fashion, which I didn't find.
One of the problems we have when approaching the more successful world governments is understanding ... well, I guess good intentions? There's kinda two sides to the story of Dear Leader. On one side, the self-aggrandizement as the father of the country, on the other side the act of actually trying to be the father of the country. Obviously a strongman today is mostly running the show almost entirely for selfish reasons but what you kinda see in the USSR and modern day China is at the same time an attempt to make the state better off. Which, of course, falls prey to effective use of power. "Do this or you will be executed" doesn't work very well.. not with the US approach to the death penalty, not to the totalitarianism of the attempted Communist state.
But, even today, there's tons of "Good idea, bad implementation" things that the Chinese government does where the rest of the world governments just let things get worse.
The vibes I was getting in the days of Lenin from my reading was interesting. Lenin was the leader of the USSR but not in the way that Stalin was. The Bolsheviks of the time insisted that things be discussed and debated and worked through and not even Lenin was above that. And there was a very forward-looking idealistic sort of viewpoint. They could reject everything and do things right for once and many of them were new to power so they were freed of that worldview. And a lot of those things didn't pan out as well as they wanted it to and people started to need to be "convinced" to do the new thing. First the "useless" hereditary upper-class, but then everybody else. And then eventually Lenin died and Stalin didn't have that much patience for the Bolshevik old-guard and took over.
tl;dr: In a sense, it's as if a bunch of Star Trek fans had toppled a government and were trying to build the best government ever for the future, using whatever means necessary.
Bureaucratic systems world based on control of information and decision making. If there are insufficient mechanisms for maintaining checks on power accumulation, those systems can be abused by psychopaths and used to accumulate power. The same applies to capitalist structures.
Let's look at it this way - they were already going to be dictatorships, the dictator picked what he told the people they'd get. Most of the big ones all say Power To The People as they're pushing their way to the top, but as soon as they get there they make themselves permanent. Some of them took a pretty good stab at it like Mao or Stalin, but they killed their people in droves to make it happen. Once that happens you gotta stay in power or they're going to kill you. And of course, with themselves at the top of the heap, they took everything for themselves and The Party, and The Party became the end all and be all instead of actually advancing the country.
Any system that gives a relative few authority over everyone else will sooner or later become autocratic, simply because that power inevitably comes to be held by those who desire it the most and are most willing to do whatever it takes to gain and hold it, and they tend to be greedy, power-hungry, dishonest, amoral assholes.
As far as that goes, the only real differences between systems are the specific hoops the assholes have to jump through.
Broadly, in a capitalist system, political power is awarded to the wealthy, while in a communist system, wealth is awarded to the politically powerful.
So the greedy, power-hungry, dishonest, amoral assholes follow different paths in different cases - accumulating wealth with which to buy access to political power in one or climbing the ranks of the ruling party in order to gain wealth in another - but the overall dynamic is always the same.
And that's a large part of the reason that I'm an anarchist.
Because at its very base it’s conceived in violation of consent.
“From each according to his capacity” is the absolute essence of exploitation. Like, there’s no more straightforward way of saying “You look like resources and we’re gonna take everything you have”.
It’s only a “good idea” if you don’t think of people as having free will and the ability to consent. Communism is a great idea if you’re playing Command & Conquer and all your little units exist only to act as pawns in your game.
Regimes tend to change with violent revolution, as it's rare for a person to willingly give up their own power. Revolutions have leaders, and those leaders are the ones responsible for distributing the power to the masses. But it's rare for a person to willingly give up their own power.
Even in the rare instance where a person does give up their power, all you need is for one person to take advantage of the system. Communism rewards people for their labours, but someone will need to judge how much people should be rewarded. One corrupt judge slips in, and the system corrupts with them.
I think because true communism never existed. All the previous attempts were flawed, people got corrupted, misused their power and it's difficult to overcome human nature. It might work in theory (or not). But so far the attempts weren't that many and they were all flawed for different reasons.
To simplify, two main reasons. First when done via revolutions it often causes economic and societal shock in which autocrates take the power away from the people. And second, when done peacefull, foreign intervention of secret agencies which again try to put autocrates in powerful positions.
Lea Ypi's book Free is a phenomenal book describing the albanian communist period. Can't recommend it enough.
I grew up in DDR. It fails because it doesn't reflect reality. People are different, can do different things, and want different things. An ideology that simplifies people into classes, stands between people and their dreams. And will always need an ever increasing police force to force reality to look like the ideology.
3 explanations, in order from what I believe most likely to least:
It could be selection bias. All communist nations originated from dictatorships, and as democracy isn't a key part of communism, any democratic ideas get kicked to the side. It may require a dictatorship in the first place for a communist revolution to occur, as democracy may lead to people feeling content enough with the system that they may not feel it needs fundamental change.
The inevitable need for concentration of power in the hands of a few. Assume that the powerful will always try to concentrate power in their own hands one way or another. Capitalist societies use wealth (a.k.a. purchasing power) to replace the concentration of political power that a dictator would enjoy. As communist societies lack such a mechanism, the powers-that-be can only use political power to force their own superiority.
The centralization of economics leads to concentration of economic power that can be used effectively to buy loyalty from would-be challengers to a dictator's power.
First, and above all else, there are assholes (US) who will prevent you from having nice things. Democracy is the easiest vector to let CIA/money get a corrupt asshole into power. Democracy tends to be a fiction anyway. Money/CIA/Media control is just part of the reason. Should you let corrupt assholes vote or run for power?
A country that has an army has dictatorial power, whether there is a theater of elections or not. An autocratic chain of command controls it, and if you don't behave, regardless of your constitution, you get smacked by the army.
In the US, there is communism for the corporatist oligarchy. Government they own will protect them from competition and bail them out when they fail. The CIA/media defines the communists as anyone who is not as pro business as the most pro business corporatist oligarch. US is a pure dictatorship in that Israel first corporatist oligarchy is guaranteed to win every seat/election, or 95%+ of the seats anyway. Every NATO country has a CIA allegiant party leader is also guaranteed to produce a CIA allegiant government. CIA vets all appointments to EU government to be pro US dictatorial NATO. IMF has 50%+ of votes all from US colonies.
Celebrating media simplifications of Democracy vs. non-US-compliant is the wrong metric to apply to nations. Industrial policy meant to promote equitable prosperity or defense from Imperialist forces determined to subjugate them are more important to a nation than what US media describes them as. "Everyone" loved Russia when they had Yeltsin as a puppet privatizing everything cheaply to US interests, just as they love Zelensky for the same. Ukraine, since US coup, is an apartheid ethnostate, which cannot qualify for any objective definition of democracy (we praise it for it anyway), and recently has suspended all elections.
in theory communism makes resources the property of everyone. In practice, somebody has to manage the resources, and in doing so controls them. if you control the resources, and especially if you have the power to defend that control, you effectively own them. this means that while in theory the people own everything, the truth is that the government owns everything. by similar logic to the first bit, if they own everything then they have control of everything, meaning that they are authoritarian. that being one of the major defining characteristics of a dictator its not far from there to become one even if you aren't trying to. ironically, this is all how it's intended to work save for the dictator part. this is the apple mouse charging port of communism, an intentional thing with a bad result that can't be given up without invalidateing things you have said or done.
also, communism tends to be brought about by coups and coups tend to lead to authoritarian leaders, compounding the above issue.
In Russia it's because of the cult of personality, or populism, that developed around Lenin and Stalin. Mao in China, pretty similar. You should appreciate how a country falls into chaos and madness when a populist takes power and ignores all legal and cultural norms and gets away with doing whatever they want.
Lots of good answers here - it's the kind of question where lots of explanations are partly correct. For me, the decision by early communists to advocate for violent revolution as the only or main way of bringing about communism is a key factor.
It's pretty common for revolutions to produce dictators, going right back to the fall of the Roman Republic. Ironically, the Roman Civil War that preceded the fall was won by the populares - the people's movement, as opposed to the optimates, the aristocracy. And yet, the end result was the abolition of the tribunes, which had been the people's branch of the legislature, and the establishment of the Dictatorship of Julius Caesar, then the Principate of his nephew, Augustus, who we now regard as having been the first Roman Emperor. It wouldn't be accurate to project back our exact ideas of democracy or class politics to the Romans, but it's pretty telling that one of the first explicitly 'class-based' civil wars in history turned out this way.
Many centuries later, the Wars of the Three Kingdoms in the British Isles had a similar outcome: the royalists were defeated by the parliamentarians, only for the victorious generals to set up one of their own as what we would now call a dictator (Oliver Cromwell as 'Lord Protector'), who was virtually a king himself.
(Worth noting here that many people assumed George Washington would turn out to be another Cromwell. The fact that he didn't and the question of why he didn't, is not something I know enough to even begin to speculate about, but is definitely something to look into when trying to understand this topic.)
Most relevant for the early communists was the French Revolution, which led to the rise of Napoleon Bonaparte who, more or less explicitly imitating Caesar and Augustus, made himself sole ruler of France, first as 'Consul' (a title also borrowed from Classical Rome), then Emperor. He was also followed, a little later, by his nephew doing a very similar thing, again explicitly imitating the Romans.
Ironically, Marx himself wrote about this exact tendency, even calling it 'Bonapartism', to warn revolutionaries to try and avoid it. I don't know how exactly he missed the point that the very thing he elsewhere advocated for - violent revolution - was itself the cause of Bonapartism but it seems he did. Plainly, the early Marxists didn't sufficiently heed this warning, for whatever reason (and see other replies in this thread for many good suggestions!).
Basically, if you're going to advocate for the violent destruction of a system of government, you are running a major risk that in the ensuing chaos, someone very good at being violent and decisive will end with far too much power.
a) when you start a game of monopoly, everybody is equal. by the end of the game, wealth (think of wealth as an analog to power) snowballs and only one or two people will have all the resources.
when you start a communist government, it's not a fresh game of monopoly. it's a continuation of the previous game. and the vast majority of people are joining in after the wealth has been accumulated. therefore, power remains in the hand of the powerful
b) there is a large variance in human capabilities. to be frank, the vast majority of people are sheep. their world view is narrow and motivation stunted. they don't really care very much about things outside of their life and they don't want to learn, grow, etc. there isn't anything wrong with that, and there's sort of a whole religion based on this
but some people are very talented, ambitious, and greedy. these people will end up at higher positions, no matter your form of government. humans tend to naturally distribute ourselves in hierarchies. aka pyramids
this goes all the way back to our primate roots. look at chimps where the male leader of the pack has dibs on which female monkey he wants to mate with. the weaker monkeys have to bow their head and take what they can get.
tldr: hierarchy and pyramids are in the very fabric of human existence. doesn't matter what form of government or economic system you pick. pyramid will develop somehow, someway
You can really ask the same question about capitalist societies. Why is there such oppression? Why is there a group that can do anything and a group that cannot? Regardless of your political system, human behavior is the same and it usually involves insecure ape-like people who want power for power's sake. Communism, just like every political system ever created, trends towards this sort of behavior.
As someone else said, desperation will cause people to move towards authoritarian thought, be that the extreme right (fascism) or the extreme left (communism).
By its nature, communism requires large amounts of control, as it's a centrally planned economy. The state decides if it needs more coal, wheat, tools, steel, etc, then conscipts people as workers for various industries. Instead of an economy controlled by demand business owners, it is controlled by the state.
To maintain that control you need to maintain control of the people.
In modern communist societies the government has an insane amount of power and control over just about everything. This power and control attracts a certain type of person who thirsts for power and control. People usually develop a bloodthirsty desire for power and control due to underlying psychological issues. These issues influence the person to think they ALWAYS need more power (think anorexic person who weighs 95lbs but still insists they are overweight).
Because it is not human nature and has to be forced on people. Eventually even those who are in charge of it fall into the normal human nature of social structures and such.
What makes sense to me, is that unlike capitalism, communism requires a government to function. Well, and how do governments fail? By turning into a dictatorship.
Because of bad ideology. States, classes, inequalities, and hierarchies are good and desirable. Try to build a system ignorant of the primary components and then wonder why it always fails.
Because you concentrate all resources into the government and not distabute it with money. Communism = work for the government and hope they give you hand outs; Capitalism = work for enough money to buy anything you want, the better your skill the more money you make. The best system is obv social-democracy.