[poilcn]

You mention Pinker, that opens question whether you've met with work of Nicolas Taleb. He is not Marxist per se, one could say he's the opposite, but he is an ardent opponent of Pinker and his kind of reasoning, so his books could've challenged Pinker's opinion on these topics as well.

[jmeister]

Taleb has attacked Pinker only on some technical statistics issues related to trends in violence post-Enlightenment and maybe merits of IQ.

Taleb leans libertarian on large scales himself.