Everyone wants to rule the world and think and believe that they can become masters of the universe.
No one can .... a few of us might be able to attain that possibility momentarily but it will never be possible to make it last.
So the problem lies with money and wealth.
Remove and outlaw excessive wealth. Go ahead become a millionaire with ten million, no one will stop you but you are no longer allowed to gain any more than that.
Once excessive wealth is removed and more people are able to share wealth and power .... then we can talk about world problems like adults ... equal adults who have an equal chance at the benefits but also an equal share of the risks of failure.
Right now, the few people holding the power have no risks and only stand to benefit, no matter what happens, so they have no incentive to change. The majority who have no power risk losing everything but have no power to change anything.