I take it that (1) the central problem of political philosophy is how to deploy philosophy in the criticism and direction of practice. This paper maps out the basic terrain of the relationship between (A) neo?Kantian Critical Theory (for example, Jürgen Habermas), (B) hermeneutics (for example, Charles Taylor) and (C) constructivism (for example, Gilles Deleuze and Felix Guattari). It contends that this central problem (1) is not met by the arguments of (A) and (B) ? these representing what I call (...) ?the communicative turn in political philosophy?. They assume ?democratic dialogue? is its own justification and that from it spring both truth and right. The key objection is that the communication of opinions is not the same as the demonstration of their validity. I argue that (C) may help to take us beyond the failures of (A) and (B). (shrink)