Summarizes events of a conference on evolutionary biology in Chicago entitled: "Macroevolution." Reviews the theory of modern synthesis, a term used to explain Darwinism in terms of population biology and genetics. Issues presented at the conference are discussed in detail. (CS)

Comments on the personalities and viewpoints of Richard Leakey and Donald Johanson, paleoanthropologists who hold differing views on the origin of humans. Summarizes major paleoanthropological finds and suggests the use of radio-immunoassay techniques for untangling the human family tree. (JN)

Examines two views about acceptance of Darwin's theory by scientists in Great Britain; that all scientists had accepted it within ten years after the publication of "Origin of Species," and that young scientists accepted the theory faster than old scientists. Concludes that both views are not accurate. (GA)

Summarizes the views of Ernst Mayr on the controversy over evolution which exists between physical scientists and biologists. Discusses the uniqueness of individuals, work by population geneticists and mathematical geneticists, complexity in nature, rates of change, modes of change, and the need to ask "why". (DC)

Describes recent research by Edward Steele appearing to support the Lamarckian theory of inheritance. Steele suggests that a mutant somatic cell favored by the environment will undergo clonal expansion. Altered genetic materials from these cells is then picked up by C-type viruses and inserted into the germ line genome. (CS)