Probably the GiveWell website, because it was the first time I realized how hard charity evaluation was, and that specialization was helpful so that some people could do a better job at it than I was going to be able to do in my spare time.
Yes, forgot to add GiveWell website, quite important in my early days. Especially their post on flow-through effects relieved some of my concerns that EA mental models may be too narrow.
Probably the GiveWell website, because it was the first time I realized how hard charity evaluation was, and that specialization was helpful so that some people could do a better job at it than I was going to be able to do in my spare time.
Yes, forgot to add GiveWell website, quite important in my early days. Especially their post on flow-through effects relieved some of my concerns that EA mental models may be too narrow.