

I don’t think that the Rats are an offshoot of the Skeptics and New Atheists just a space which competed for the same young, male, educated, Autistic Anglo audience. They deliberately removed the parts of the skeptic curriculum which involve introspection and ethnography, because they all wanted to run some grift on their audiences so the audiences needed poor epistemic hygiene.

The biggest crossover between skeptics and rationalists I can think of is Julia Galef, and she podcasted with a philosopher who debated Yud once then decided it was infra dignitatem. She also dropped out of CFAR when it became more open that the rationality workshops were for finding Sarah Connor.