Alice H. Eagly 
Sex Differences in Social Behavior [PDF ebook] 
A Social-role interpretation

In presenting an innovative theory of sex differences in the social context, this volume applies social-role theory and meta-analytic techniques to research in aggression, social influence, helping, nonverbal, and group behavior. Eagly“s findings show that gender stereotypic behavior results from different male and female role expectations, and that the disparity between these gender stereotypes and actual sex differences is not as great as is often believed.