In the recent burst of enthusiasm for endorsing violence and revolution, there has been too little reflection on why men ought to obey the law. Indeed, it seems that the charge of irrelevance can be levelled against anyone who insists on thinking seriously about traditionally important issues of political ethics such as political obligation, which, according to Isaiah Berlin, is "the most fundamental of all political questions." Fortunately, as these books show, not all philosophers and theologians have succumbed to the attraction of easy slogans.