The Diversity Delusion by Heather Mac Donald is a provocative work of nonfiction that examines the influence of diversity and identity politics on American universities, education, and wider society. Mac Donald argues that certain approaches to race, gender, discrimination, and diversity have weakened traditional academic standards, merit-based systems, open intellectual inquiry, and the study of the humanities. The book explores topics including campus culture, affirmative action, implicit bias, diversity bureaucracy, free speech, political correctness, and the changing role of higher education. It presents the author’s critique of contemporary university culture and argues for a return to open inquiry, classical liberal education, and intellectual freedom.