Sociology for Durkheim was by no means a knowledge closed in its specificity. It was rather an open science, permeable to contributions coming from other disciplines. For him, the task of sociology was to study what held societies together, giving place to reflective change and progressive development. This is an epistemological and political model that still retains all its relevance today: an example to be rediscovered against any reductionist conception of the vocation and object of social sciences; an encouragement to see sociology as an indispensable protagonist for an authentic interdisciplinary dialogue in the field of humanities. It is one of the best legacies Durkheim left us, that this book attempts to illustrate.