The new edition of this casebook on sex-based discrimination is the most significant revision since the mid-1980s. This is a more nuanced and contemporary examination of the law's treatment of discrimination based on sex, gender, sexual orientation, and transgender characteristics. New cases from the United States Supreme Court (including Wal-Mart v. Dukes) and state supreme courts (including Iowa's Varnum v. Brien) deal with emerging trends and issues in constitutional law, employment discrimination, family law, education law, and criminal law.