This is the first casebook designed for both liberal arts undergraduates and law students. Considerably shorter than other casebooks, it focuses on the controversies over constitutional interpretation leading up to the United States Supreme Court's holdings in Lawrence v. Texas (2003) and Obergefell v. Hodges (2015): namely, that the Constitution's commitments to liberty and equal protection encompass rights of same-sex intimate association and marriage. It also takes up emerging conflicts between protection of constitutional rights for gay men and lesbians, on the one hand, and First Amendment claims of freedom of association and religious liberty by persons who oppose protection of such rights, on the other. This book will be suitable as either the basic text of a one-semester course or as a supplementary text for courses in civil liberties.