Myra J.Hird is Queen's National Scholar and Associate Professor in Sociology at Queen's University, Kingston, Canada. She is the author of several articles on new materialism, sexual difference, intersex and trans. She is also the author of Women, Men and Violence: From Childhood to Adulthood, and co-editor (with George C. Pavlich) of Sociology for the Asking.

'...the wealth of informatin presented here...is invaluable to those grappling with the social construction of 'sex' and 'sex differences'...it is refreshing to read research that has 'gone back' to the body and recognized its genetic and material realities.' - Danny Beusch, Sociology (British Sociological Association)

• Introduction Making Sex, Making Sexual Difference The Body of Sexual Difference New Materialism, Nonlinear Biology, and the Superabundance of Diversity The Nonlinear Evolution of Human Sex Sex Diversity in Non-Human Animals Sex Diversity in Human Animals How to Have Sex Without Women or Men Glossary of Terms Bibliography