This essay argues that realism in ethics and in politics is best understood as a discipline of mind directed against wishful thinking. Reading Geuss in this context, against the background of the work of Bernard Williams, allows us to specify what is of value in his work as well as to illustrate the limitations – of argument and of tone – of that work. More specifically, it is argued that while the fairly catholic character of Geuss?s realism is a strength, his critical considerations of theorists such as Rawls and Nozick and concepts such as human rights not only show little intellectual grasp of these positions, but also typically fail to respect his own criteria for understanding and evaluating political theories