David Johnston David Johnston teaches political philosophy at Columbia University, where he has served as Nell and Herbert M. Singer Professor of Contemporary Civilization and Joseph Straus Professor of Political Philosophy. He is the author of A Brief History of Justice, The Idea of a Liberal Theory, and The Rhetoric of Leviathan: Thomas Hobbes and the Politics of Cultural Transformation, and is the editor of a collection of readings entitled Equality and coeditor of Machiavelli on Liberty and Conflict. Read More Read Less