Argues that ontogenetic and phylogenetic theories are related and that such a coupling can be established only in reference to a metatheory. The metatheory is construed in terms of a combination of logical coherence and requirements necessary for generalization as well as comprehensive, philosophical representations of living beings (e.g.,…

Argues for unifying the conceptual frameworks of theories of evolution so that problems and their solutions in one theory may be transposed and explored in the others. The argument is used to reconsider the mutationist and Darwinian theories of evolution in the light of Piaget's nonstandard theory of evolution. (Author/RH)

Discusses how genetic data on present human population relationships and data from the Pleistocene fossil hominid record are being used to compare two contrasting models for the origin of modern humans. (TW)

Discusses the conditions for validating customary phylogenetic procedures. Concludes that the requisites of homogeneity and completeness for proved short lineages seem satisfied by the Hennigian but not the Haeckelian procedure. The epistemological antinomy of the two procedures is emphasized for the first time. (Author/RH)

Reviews current research on a woman's chances of bearing twins and the genetic relationship, prenatal competition, and personality similarities between twins. In addition, the nature/nurture controversy is discussed in terms of evidence from studies of identical twins reared apart. Future studies are suggested to discover the ways twinning might…

Presented are the three main theories that describe the pattern of evolution of geographic variants of H. sapiens--the multiregional model, the out-of-Africa model, and the gene-flow or hybridization model. The contributions of geneticists, paleoanthropologists, and the history of fossils are included. (KR)

Discusses some of the similarities and differences between the attitudes of Japanese and American citizens toward science. Reports on major discrepancies between the two populations' views about such things as evolution, the development of new plants and animals, and the effect of rocket launchings on the weather. (TW)