While Peterson states that women and men are fundamentally different, Hyde argues there are no existing gender distinctions.

“A 2005 analysis of 46 meta-analyses that were conducted during the last two decades of the 20th century underscores that men and women are basically alike in terms of personality, cognitive ability and leadership"(American Psychological Association). Psychologist Janet Shibley Hyde, PhD, of the University of Wisconsin in Madison has discovered more similarities than differences between males and females from childhood to adulthood; resulting in what she calls a 'gender similarities hypothesis.'

Women and men have been led to believe the misconception that females and males are fundamentally different. Social norms causes the roles they are given in society to be unchangeable due to their belief of fixed sex-based traits. Hence, the belief of fundamental gender differences causes gender inequality.