Why it’s here. “The God Delusion” sold more than three million copies in its first year, was translated into dozens of languages, and made Richard Dawkins the most recognized public atheist in the world. Whatever one thinks of the book’s arguments, this cultural fact matters: it introduced the intellectual case against religious belief to an enormous audience that had not previously encountered it, and for many readers it was genuinely revelatory — the experience of seeing arguments made clearly that they had thought but never heard expressed. That is not nothing. The book belongs on this shelf because it is a document of importance in the history of freethought, and because the conversation it started — heated, sometimes unpleasant, sometimes illuminating — continues.
What it offers. Dawkins is at his best when he is doing biology. His account of how natural selection produces the appearance of design — rendering unnecessary the argument from design that has anchored natural theology for centuries — is clear, authoritative, and hard to answer from within biology. His chapters on the evolutionary origins of religion and on the socialization of children into religious belief are interesting and original, reflecting his strengths as an evolutionary biologist and popularizer of science. The book is also energetically written; Dawkins has never been a dull prose stylist, and his confidence in his own position gives the book a rhetorical momentum that carries the reader forward.
A word of caution. The philosophical sections of the book are weaker than the biological ones, and the weakness matters because the central question — whether God exists — is, at the level Dawkins is addressing it, a philosophical question. His treatment of the ontological argument, for instance, is dismissive in a way that suggests he has not engaged with the serious literature on it. His critique of religious ethics is often compelling but sometimes caricatures what sophisticated religious ethicists actually argue. And his polemical tone — contemptuous of religious believers in a way that exceeds what his arguments justify — invites the defensiveness that makes genuine dialogue difficult. Philosophers of religion, including sympathetic critics like Michael Ruse and Terry Eagleton, raised these objections at the time and were not seriously answered. Dawkins should be read alongside Russell, alongside serious contemporary philosophy of religion, and alongside the best defenses of religious belief, rather than as a self-contained case. The arguments for atheism are stronger, and more interesting, than this book makes them appear.