It's quicker to recruit existing people and turn them into rationalists than to create new people from scratch. This approach will eventually exhaust the gene pool, but not for hundreds of generations.
Good luck explaining Bayes' law to people with IQs below 90.
Recently, LWers Will Ryan and Divia Melwani (now Will and Divia Eden) were married, with Eliezer Yudkowsky officiating.
I've been to 40+ weddings in my lifetime, and this was my favorite ceremony yet. Here is the video, and below is the transcript of Eliezer's... what's it called? "Blessing"?