“cluster as being stocked with only marginally creative people, the second with highly creative ones. Chapters 5 and 9 return to this topic. As presented here the perceptgenetic approach may seem one sidedly applied. There is, however, a theoretical base, put forward in Chapter 1. The theoretical outlines presented in that chapter rely to a high degree on earlier formulations, particularly those written up in Kragh and Smith (1970). An important, later influence has, of course, been colleagues in micro- and perceptgenetic research all over the world: Werner Frohlich of Bonn University, later Mainz; Juris Draguns of Penn State University; Uwe Hentschel of Mainz and Leiden Universities; John Cegalis of Yale University; and, from the biological side, Jason Brown of New York University Medical School. A number of important contributions by perceptgenetic researchers”