This book presents thirteen essays from a leading contemporary political scientist, with a substantial introduction bringing together the themes. The topics covered include political and social power, freedom, choice, rights, responsibility, the author's unique account of luck and systematic luck and the nature of leadership. There are also discussions of conceptual analysis, the structure-agency debate, luck egalitarianism, Sen's liberal paradox, problems in the measurement of freedom and choice and the differences between instrumental and intrinsic accounts of the value of freedom and related concepts. The wide-ranging material will provide an excellent text for students at all levels. It is appropriate reading for a host of courses in the fields of political science, political sociology and political theory at both undergraduate and graduate level. Whilst addressing some philosophically difficult and advanced subjects, the accessible writing makes the subject-matter comprehensible for all levels of students.