Once we understand that gender is distinct from sex, a whole world of possibilities open up, along with the potential for confusion. Shifting attitudes about the roles of men and women have allowed younger generations to refuse to be pigeonholed into conventional gender norms. As a result, the 21st century seems ripe for a gender revolution. The viewpoints in this volume approach gender from a variety of perspectives, providing readers with food for thought about where gender comes from, how we can make sense of its importance, and where it might be headed.