The relationship between political science and the biological sciences is somewhat different than that between the other social sciences and biology. First, political scientists appear to have developed a contemporary sensitivity to the life sciences a bit earlier than economics, sociology, and to some extent current anthropology. Second, political scientists seem to have engaged in a very broad “crossing over” into the natural sciences. This has included borrowing not only from sociobiology and ethology but also from psychophysiology, neurobiology, and medicine. Third, as will be seen, political scientists have been especially sensitive to the public policy aspects of a range of biologically based issues.