This article shows that the work of Jacques Maritain and Emmanuel Mounier contains a distinct political theory. Despite the differences in the foundations of their thought, Maritain and Mounier were both Catholic philosophers looking for the task of man in society. They both came to the conclusion that the vocation of man necessarily implies a social and political aspect. The integral development of the human person requires a societal framework, which is the common good that politics is supposed to realize. (...) However, both Maritain and Mounier point to the intrinsic dangers of the required exercise of political power. Alert and active citizens are necessary to keep political authorities from going astray. A lot of personalists' concrete ideas on the organization of democracy are no longer viable, but the core of their political theory is a particular vision on individual political responsibility. What personalism makes clear is that politics concerns each one of us. This is not the case because politics would be a distinguished occupation in the Aristotelian sense, since the personalists focus on the dark side of politics; the power struggle, the façade of democracy, the tendency towards oppression and totalitarianism. Politics is, however, a necessary means to build and protect the framework that allows us to develop ourselves as human beings. The only way to ensure that politics lives up to this task is when citizens take political responsibility. This call for a generally vigilant and active citizenry remains an important warning with regard to a liberal concept of man and society. (shrink)