Harry Potter and the Methods of Rationality, followed by the LessWrong sequences. After I had moved to the Bay Area, EA had become pretty closely entangled with the whole rationality thing, but philosophically the sequences had covered almost all of the EA material and I was already on board for spending my life on doing the most good, so it was more of a matter of identification than a matter of changing my mind at that point.
Harry Potter and the Methods of Rationality, followed by the LessWrong sequences. After I had moved to the Bay Area, EA had become pretty closely entangled with the whole rationality thing, but philosophically the sequences had covered almost all of the EA material and I was already on board for spending my life on doing the most good, so it was more of a matter of identification than a matter of changing my mind at that point.