Providing an overview of the political and ethical philosophy of Martha Nussbaum, this book presents the ideas of this significant philosopher and shows how her thought, while rooted in the traditions of classical philosophy, illuminates a number of current, controversial issues. The book takes a chronological approach and aims to show how Nussbaum's thought has continually grown and developed. It takes the reader through her views on ethics, political philosophy, feminism and women's rights, LGBT issues, animal rights, religious tolerance and accommodation, contemporary politics, and global justice. It also explores contested areas of her thought, such as the extent to which she is a perfectionist liberal, challenges to her view that religion merits special accommodations, utilitarian objections to the capabilities approach, criticisms of her brand of liberal feminism, and cosmopolitan objections to her nation-state-based liberal conception of global justice. Each chapter focuses on a book from a different stage of her career, starting with her first book, The Fragility of Goodness and ending with her most recent, The Cosmopolitan Tradition.