I would argue the primary cause of all of these problems is that we live in a world of finite resources. I think all of those things would still be problems under any political system we tried to implement. If there was plenty of resources for everyone we would just multiply until that wasn’t the case any more.
I reject the notion that we could rid the world of these things, the entirety of human history provides empirical evidence that backs me up on this. I think it’s fantastical to think we could rid the world of these things, all we can do is try to reduce the impact as best we can in the limited ways that we can as individuals and as a society.