The author presents a discussion of certain portions of Arthur Jensen's controversial article. The general conclusion is that Jensen has not provided substantial evidence that there are differences in neural structure among children from different social or ethnic groups which are genetically determined. The reviewer reacts to Jensen's conclusion "that schools and society must provide a range and diversity of educational methods, programs and goals, and occupational opportunities, just as wide as the range of human abilities." While the reviewer finds no objection to this general statement, he feels that the premise upon which it is built is rather flimsy because of the implication that individuals of different backgrounds are genetically different. Other criticisms of Jensen's article include his over-reliance on genetic authorities, a failure to suggest a research design capable of handling certain difficulties, and the drawing of premature conclusions. (BW/Author)