The recent massive attack by fundamentalist Christians on the teaching of evolution in the schools has left scientists indignant and somewhat bewildered. Creationist arguments have seemed to them a compound of ignorance and malevolence, and, indeed, there has been both confusion and dishonesty in the creationist attack. First, there has been a confusion, partly deliberate, of the fact that organism have evolved with theories about the detailed mechanics of the process. The facts of evolution are clear and are not disputed by any serious scientific worker.