Please see Section D of Morton Horwitz, The Transformation of American Law, 1870-1960 (Oxford University Press, 1992), for a discussion of 'Categorical Minds'. See also, Kathleen M. Sullivan, Post-Liberal Judging: The Roles of Categorization and Balancing, 63 U. Colo. L. Rev. 293, 312-17 (1992).