Lets keep it real.
Human nature is fucked up. Human nature being fucked up is the reason that capitilism exists.
With that said, for capitilism to thrive, you need to use a persons workforce as a commodity. You need a poor class of people so the rich can get richer.
This doesnt necessarily mean keep black people poor in America. Even though that is a part of it. This could mean use covert actions to cause war in some country just so you can go and save them, rebuild it, and put that country in crippling debt and buy up all their resources for cheap.
Thats basically been America hitting the notes since WW1.
So I agree that human nature is bad to start with but thats where the govt and the system of governance comes into place. Put in checks and protect people from becoming the worst version of themselves.
The issue is when you have a country that embraces hyper capitalism because hyper capitalism is a system that rewards people for being their worst selves.
And the idea that capitalism is bad but still the best system is outdated by about 40 years because we have very succesful countries in the world that have merged capatilism and socialism together and the people in those countries have way better lives on average than americans.
Those checks and balances only work if 1. People actually respect 2. People actually face consequences for violating them and 3. People can handle having to punish those close to them for violating said checks and balances. It would also have to accept a pretty black and white judgement factor on what is considered a violation because the moment nuance and exceptions due to certain circumstances are allowed then it's going to spiral...