Reviews the perspective of Donald Campbell on creative thought and argues that the role of blind variation and selective retention in Darwinian evaluation and human invention is different. Proposes that a contrast can be drawn between "smart" and "not so smart" blind variation. (CR)

Argues that while blind variation and selective retention (BVSR) may not be involved in all forms of human behavior and thought, Donald Campbell has made a compelling case that human creativity and invention involve BVSR. The complementary nature of prior and current BVSR in creative human endeavor is discussed. (Author/CR)

Argues that the cognitive mechanisms in human creativity are, for the most part, sighted rather than blind. Reviews attempts to apply evolutionary ideas to psychology and argues that these ideas do not apply to the psychology of human creativity. An alternative sighted-variation framework is then proposed. (Author/CR)