If the clash between theism and atheism were merely about metaphysical ideas, personal choices, or even quests made by consenting adults, then it should indeed be a negotiable difference in societies which allow for many other kinds of diversity. Thinkers like Mr Gray or even Bishop Jenkins may help us negotiate. But they do not entirely solve the problem. It is striking that the most intractable disputes between believers and non-believers concern the treatment of children: how and by whom they should be raised; what they should be taught about the origin of the world; whether, in the name of religious custom, their bodies should be mutilated; whether the education of boys and girls should be separate and in some way differentiated, as conservative Islam mandates; and at what point in their biological development one can speak of a life which cannot morally be terminated. With or without the guidance of brainy public intellectuals, these are hard arguments which lead to hard choices.