

It was basically the only “empirical” (scare quotes well earned) data they actually used in their “model”, even then, they decided exponential improvement wasn’t good enough, they plugged it into a hyper-exponential model that went to infinity at just a few years regardless of the inputs.
A little exchange on the EA forums I thought was notable: https://forum.effectivealtruism.org/posts/EDBQPT65XJsgszwmL/long-term-risks-from-ideological-fanaticism?commentId=b5pZi5JjoMixQtRgh
tldr; a super long essay lumping together Nazism, Communism and religious fundamentalism (I didn’t read it, just the comments). The comment I linked notes how liberal democracies have also killed a huge number of people (in the commenter’s home country, in the name of purging communism):
The OP’s response is to try to explain how that wasn’t real “liberal democracy” and to try to reframe the discussion. Another commenter is even more direct, they complain half the sources listed are Marxist.
I think it’s a bit bold of this commenter to ignore the empirical facts cited in how many people ‘liberal democracies’ had killed and to exclude sources simply for challenging your ideology.
Just another reminder of how the EA movement is full of right wing thinking and how most of it hasn’t considered even the most basic of leftist thought.