I'm a third of the way through C21. Skimming the beginning of Acemoglu and Robinson, feels like they are criticizing points that Picketty raises - specifically that politics plays a substantial role in inequality, and r vs g. Maybe it's just a question of degree. Probably worth more than a cursory glance.

Anyways, since you linked to such a relevant C21 response, do you know if there's a team-piketty response to Acemoglu? No longer have access to JSTOR etc, and am not necessarily well equipped to analyze the quantitative claims.