A practical, evidence-based guide that empowers educators to embrace constructive disagreement as an essential tool for teaching controversial topicsAmid political pressure, campus unrest, and growing institutional risk aversion, university educators are retreating from the most contested issues of our time, from race and gender to climate change, religion, sexuality, and political violence. No Topic Off Limits makes the case that teaching controversial subjects is not a choice but a democratic responsibility. Drawing on interviews with more than seventy educators across the globe and anchored in the messy realities of the classroom, this invaluable guide offers a tool kit for teaching polarizing subjects to college students, demonstrating how constructive disagreement can become a source of intellectual growth, creative possibility, and unexpected connection. The university classroom remains one of the last civic spaces where students can grapple seriously with people whose values, politics, and experiences differ sharply from their own. Daniel Kupfert Heller argues that the retreat from controversy in higher education comes at a dangerous price, leaving students unequipped to engage in the difficult disagreements that democratic life demands. In this book, he shows educators how to create inclusive classrooms where students learn to challenge assumptions, build trust, navigate emotions, and engage meaningfully with diverse perspectives. Rather than taking a one-size-fits-all approach, he lays out a set of strategies that educators can adapt to their own contexts, disciplines, and students. Along the way, Heller shares engaging profiles such as a Christian sociologist in Malaysia teaching LGBTQ+ history under laws that criminalize his syllabus, a bioethicist in Tehran inviting students to debate voluntary euthanasia, and literary scholar in Warsaw leading conversations about reproductive ethics in a nation where the topic still tears families apart. Informed by cognitive psychology, neuroscience, deliberative pedagogy, and trauma-informed teaching, No Topic Off Limits is an essential resource for any educator who believes their students are capable of more-and who wants the tools to prove it.