Rethinking the social -- Durkheim approaches the social -- Durkheim's philosophy of the social -- Marx on the social and the societal -- Weber's "sozial" action -- The early death of the problem of the social -- Toward a philosophy of the social -- part one : Durkheim, Marx, Weber (and Simmel) revisited -- Toward a philosophy of the social -- part two : Whitehead on sociology, societies and the social.