Bringing together the latest, cutting-edge research, with illustrative case histories of twins and their families, pre-eminent twin researcher Dr. Nancy L. Segal explores ways in which twins enhance our knowledge of human behavioural and physical development. Some of the unique aspects of being a twin illuminated here include: the biological bases of identical and fraternal twinning: the unusual language patterns of twins; what twins tell us about co-operation and competition; how twin studies affect legal decisions and settlements; the role of fertility treatments in twin and "twinlike" conceptions; what twin research reveals about athletic skill; what nonhuman twins tell us about human twinning; and the similarities and differences between same-age unrelated siblings ("pseudo-twins"). A book that sheds new light on the nature-nurture debate and on the burgeoning field of evolutionary psychology, Entwined Lives will have a profound effect on the way we think about each other and ourselves.
