1. L. de Bonald, Théorie du pouvoir (Paris: Adrien le Clere 1854) i 103.
2. A Comte, Système de politique positive (Paris: Mathias 1851) ii 181.
3. J. S. Mill, A System of Logic 9th edn (London: Longman, Green & Co., 1875) ii 469. ‘Men are not’, Mill continues, ‘when brought together, converted into another kind of substance, with different properties’.
4. See D. Essertier, Psychologie et sociologie (Paris: Alcan 1927).
5. Cf. E. Durkheim, Les Règles de la méthode sociologique, 2nd edn (Paris: Alcan 1901); and