Book excerpt: Gender Development is the first book to examine gender from a truly developmental perspective and fills a real need for a textbook and source book for college and graduate students, parents, teachers, researchers, and counsellors. It examines the processes involved in the development of gender, addressing such sensitive and complex questions as what causes males and females to be different and why they behave in different ways. The authors provide an up-to-date, integrative review of theory and research, tracing gender development from the moment of conception through adulthood and emphasising the complex interaction of biology, socialisation, and cognition. The topics covered include hormonal influences, moral development, play and friendships, experiences at school and work, and psychopathology.