The God Delusion is a clarion call to the faithless, the waverers, and even firm religious believers, to follow the author into radical atheism not merely as a private conviction but as a public profession. Wouldn´t humankind be better off without religion, he asks. John Cornwell´s Darwin´s Angel is not so much a combative repudiation of Dawkins´ arguments as a playful conversation with them, posing alternative view-points, exposing lapses in logic and errors of fact, from the vantage point of a friendly Guardian Angel.

In a telling critique cast in the classical form of a letter to atheist Richard Dawkins, Cornwell playfully repudiates the arguments in "The God Delusion," posing alternative viewpoints from the vantage point of a friendly guardian angel.