He didn't coin it: the movement's use of that name goes back to the Oxford group in 2011: https://forum.effectivealtruism.org/posts/9a7xMXoSiQs3EYPA2/the-histor

He didn't coin it: the movement's use of that name goes back to the Oxford group in 2011: https://forum.effectivealtruism.org/posts/9a7xMXoSiQs3EYPA2/the-history-of-the-term-effective-altruism https://forum.effectivealtruism.org/posts/9a7xMXoSiQs3EYPA2/... (He did use it once before then in a 2007 blog post, but if we're counting they sort of thing then https://archive.is/4d9oC https://archive.is/4d9oC from Anand in 2003 is even older.)