Biosociological theories integrate biology into sociological explanations of human social behavior. They do so by incorporating theoretical ideas and empirical discoveries from various branches of biology: evolutionary biology (especially sociobiology and behavioral ecology), ecology, ethology, neurobiology, endocrinology, and population genetics. In sociology, most biosociological theories are emerging in a new specialty area, known as evolutionary sociology.
Evolutionary sociology is not to be confused with the pseudoscience of “social Darwinism.” This new science is grounded in and guided by well-established explanatory principles, theories, models, research methods, and rules of evidence developed and used by contemporary biologists. Increasingly, the traditional disciplinary boundaries that once separated social and behavioral scientists from biologists are being eroded by those who work within the framework of neoDarwinian evolutionary theory – an area that integrates Darwinian evolutionary theory with Mendelian genetics.