Those who say that Marx ignores human nature usually mean by ‘human nature’ egoism, selfishness. Marx does not deny that in existing capitalist society people tend to be narrowly egoistic… To look at people in capitalist society and conclude that human nature is egoism is like looking at people in a factory where pollution is destroying their lungs and saying that it is human nature to cough.

Andrew Collier, Marx: A Beginner’s Guide (via commiekinkshamer)