“Both participants have played important parts in the debate over political obligation…and each is eminently qualified to represent his side in the narrower debate that takes place between the covers of their coauthored book…One conclusion seems absolutely clear: the book itself is a winner…Wellman and Simmons both deserve praise for the clarity of their writing and the rigor of their arguments, the result of which is a book that is simultaneously accessible to advanced undergraduates and “must reading” for political philosophers with an interest in the problem of political obligation.” Richard Dagger, Arizona State University, Ethics