Copying and pasting my reply elsewhere in the thread that summarizes my thoughts here as well:

I don't have the mental power at this moment to write out my full thoughts on the subject so forgive my vague thoughts (an aside- withdrawing from SSRIs is an _unpleasant experience_)

I think the problem I find with arguments that Capitalism is the best/least bad system tend to be that they start from a false premise, in my opinion. I have a friend who makes the joke all the time that any system of government works if people were just nice to each other, but he has a point. I often hear that "oh, communism doesn't work because humans are inherently selfish." That's true, if you believe that humans are inherently selfish, but my counter-point to that is asking how much of it is innate vs. how much of it is trained by our culture and reflects back in those communist attempts because the sudden change in social architecture didn't give enough time to 'train it out of' the culture.

Back to the thing my friend says - if you believe that communism doesn't work because humans are inherently selfish/greedy/etc, I'd say to you also that capitalism is currently not working _because humans are being selfish and greedy_ in a system _that explicitly rewards that_. Which, maybe is worse.

I don't pretend I have an answer for how we can get from point A (capitalist system) to point B (future space communism) in a way that slowly shifts human thinking towards mutual aid and collective action, but I think it's short-sighted to assume that the way humans act in a system that rewards greed/selfishness is innate.