I found this series of videos helpful: https://www.youtube.com/watch?v=bYkl3XlEneA&feature=c4-overview-vl&list=PLMNj_r5bccUzol670CnRnAp-a6rpd3Dym (Check out the links on the right of the video for the rest of the series.) The narrator speaks very clearly and to the point, and he's done a *lot* of research and his claims are backed up by references.