On May 5th, 1818, Karl Marx, hero of the international proletatiat, was born. His revolution of Socialist theory reverberates throughout the world carries on to this day, in increasing magnitude. Every passing day, he is vindicated. His analysis of Capitalism, development of the theory of Scientific Socialism, and advancements on dialectics to become Dialectical Materialism, have all played a key role in the past century, and have remained ever-more relevant throughout.
He didn't always rock his famous beard, when he was younger he was clean shaven!
It's more that what is "human nature" is malleable, and is ultimately determined by the systems humans find themselves in, and ultimately propels change to new modes of production. Feudalism gave birth to Capitalism.
No one is disputing that, in fact the communist manifesto praises capitalism for massively developing the productive forces at one point in time, it's just time to move on from it as it started to hinder the development of production.
yet reflects our nature as a species just the same
This is straight up a wrong, if our nature was being greedy, selfish, or an asshole everyone would have to conform to law, without exceptions, just like we all have to eat, shit and breathe. Those 3 things are actually part of our nature, everyone has to conform to these laws without exception.
Someone from the 1500s would have a horrible time in the 21st century.
What kind of quality-of-life do you think modern day subsistence farmers and hunter-gatherers enjoy? How critical has English standard literacy, modern mathematics, and digital technology sophistication become for survival?
Like, you're thinking as a settler-colonialist living a middle-class lifestyle in the modern moment. You're not thinking as a denizen of Hispanula prior to the Columbian exchange, where the primary past times were fishing, frolicking, and fucking. Move that guy up to the modern era in the highest quality of life countries in the world and they just become homeless illegal immigrants.
If I have a choice to live in the 16th century or the 21st century, and I know I'm going to be born in Haiti... fuck the 21st century, that shit sucks.
Crack open a copy of Howard Zinn's "A People's History" and find out. He quotes the original Columbian explorers in how they found the native population. The conditions were downright utopian according to the Spanish. Their response to this paradise was to rape and plunder it.
And the raping and plundering never stopped, even 500 years later.