 Michel Foucault's 1978–1979 Collège de France lectures, published a quarter of a century later as "The Birth of Biopolitics", drew attention to the importance of the Walter Lippmann Colloquium.The participants were divided into two primary camps; one, represented by Mises, Hayek, Jacques Rueff, and Étienne Mantoux, which advocated a strict adherence to Manchester liberalism and "laissez-faire"; the other camp, represented by Rüstow, Raymond Aron, Wilhelm Röpke, Auguste Detoeuf, Robert Marjolin, Louis Marlio, and Lippmann, opted for a kind of social liberalism which was more favorable to state intervention and regulation and Keynesian solutions.Participants of the Colloquium included