#[0] the term "gender" as it relates to social and cultural expectations around masculinity and femininity was first introduced in the mid-20th century by sexologist and physician Dr. John Money. Money used the term to distinguish between a person's biological sex (determined by their anatomy and physiology) and their gender identity (determined by their social and cultural context). Since then, the term has been expanded and refined by a wide range of scholars, activists, and thinkers, and is now widely used as a way of understanding the complex and multifaceted ways in which gender identity and expression shape our lives and experiences.