In this paper, following Rahel Jaeggi’s critique of forms of life, I contend that to identify genuine critical thinking we should start from an analysis of the normative nature of forms of life as the basic constituents of the social world. In this view, critical thinking can be seen as a critical behaviour. While genuine forms of life can recognize and consider the variety of concrete and diverse situations, on the contrary non-functioning forms of life’s critical rationality understands the norm (...) as applied from outside of the form of life. In this case the norm, erroneously understood as a neutral and universally applicable principle, such as economic rationality, is not able to consider the particularity of forms of life as goods in themselves. I defend the meaning that an education in critical thinking must have, as a genuine and functional rationality characterising human beings in a social world. -/- . (shrink)