This volume provides a comprehensive overview of the central questions and debates in contemporary political thought and offers guidelines for the reformulation of political theory in the light of the philosophical and substantive problems it faces today. The book includes discussion of the nature of political obligation; the interrelation of equality and liberty; gender; the public and the private; principles of justice and the conditions of their realization; democratic politics and the forms of representation; sovereignty, the nation--state and the international system; the role of international law; and war and the legitimate use of force. The volume is composed of major new essays by leading scholars in political theory from Europe, Africa and the United States: John Dunn, Stephen Lukes, Susan Moller Okin, Andrew Reeve, Jon Elster, Claus Offe, Ulrich Preuss, Iain McLean, David Held, Charles Beitz, Antonio Cassese, Onora Oa Neill, Samir Amin and Agnes Heller. Students and academics in political theory, and those in the social sciences concerned with contemporary political thought, will all be interested in this book.