50 Voices of Disbelief: Why We Are Atheists, edited by Russell Blackford & Udo Schüklenk; Wiley-Blackwell, 2009, 360 pages, $34.95. Three things strike you about this rich, passionate book. First, virtually all the owners of the “voices” come across as not only profoundly committed to their positions, but as critical and reflective—thinkers whose ideas merit serious consideration. Second, the span and diversity of the essays are remarkable: they range from deeply moving personal pieces to detailed philosophical, scientific and scholarly arguments for atheistic humanism. Third, the collective case the book mounts against theism, particularly as expressed in the three Abrahamic…