The term "gender" was first distinguished from "sex" in the 1950s, when psychologists began to discuss the idea of "gender roles"--behaviors and responsibilities given to people by a society rather than flowing from their biology. Over the last two decades, transgender people have expanded ourunderstanding of gender even further, introducing to the mainstream the concept of "gender identity," an individual's understanding of their own gender. Along the way, there have been numerous debates and controversies (i.e., what is the influence of biology on gender, how does the media impactgender and gender roles, and do transgender people reinforce gender stereotypes or help to free us from them?). In an easy-to-read format that includes questions and short responses, Gender: What Everyone Needs to KnowR guides the reader through basic definitions; the history of gender as a concept; the role of biology, psychology, and culture on gender; and gender norms over time and across the globe.