I'm fairly convinced that MWI is LW dogma because it supports the Bayesian notion that probabilities are mental entitites rather than physical ones, and not on its own merits.
Certainly Eliezer seems enthralled with the notion. Beyond that I have no opinions on the matter.
Today's post, Beware of Stephen J. Gould was originally published on 06 November 2007. A summary (taken from the LW wiki):
Discuss the post here (rather than in the comments to the original post).
This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was Natural Selection's Speed Limit and Complexity Bound, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.
Sequence reruns are a community-driven effort. You can participate by re-reading the sequence post, discussing it here, posting the next day's sequence reruns post, or summarizing forthcoming articles on the wiki. Go here for more details, or to have meta discussions about the Rerunning the Sequences series.