Reviewed by Kevin MacDonald Sir Larry Siedentop is an Oxford University historian specializing in intellectual history. A basic premise of Inventing the Individual is that ideas matter, in particular, that beginning in the ancient world, the ideologies associated with Christianity had a profound effect on the West. As a culturally oriented evolutionary psychologist, I found it a fascinating account of the origins of Western individualism. To be sure, as discussed below, I stress ethnic factors as also playing a major role, but there is certainly room within evolutionary psychology for an idealist influences on history. Such a view rests on a powerful intellectual foundation. 1 That foundation is based on psychological research indicating two very different types of psychological processing: implicit and explicit processing. These modes of processing may be contrasted on a number of dimensions. 2 Implicit processing is automatic, effortless, relatively fast, and involves parallel processing of large amounts of information; it characterizes the modules described by evolutionary psychologists. Explicit processing is the opposite: conscious, controllable, effortful, relatively slow, and involves serial processing of relatively small amounts of information. Explicit processing is involved in the operation of the 1 For an intellectually similar treatment of a historical phenomenon, see Kevin MacDonald, " The Antislavery Movement as an Expression of the Eighteenth-Century