Leonard "Len" Lawlor (/ˈlɔːlər/; born November 2, 1954)^[1] is Edwin Erle Sparks Professor of Philosophy at Pennsylvania State University. He specializes in nineteenth- and twentieth-century Continental philosophy.^[2]

Lawlor received his doctorate from SUNY Stony Brook in 1988 and taught at the University of Memphis from 1989–2008, where he held the position of Faudree-Hardin University Professor of Philosophy from 2004 to 2008 before joining the faculty at Penn State, as Sparks Professor of Philosophy.^[3] He is known for his writings on phenomenology and on the figures Jacques Derrida, Gilles Deleuze, Michel Foucault, Henri Bergson, Maurice Merleau-Ponty, Edmund Husserl, and Jean Hippolyte. Lawlor's most recent work concerns transcendental violence and possible responses to it. His recent From Violence to Speaking Out takes up the question of responses to violence. Although From Violence to Speaking Out contains precise expositions of important ideas in Derrida, Deleuze, and Foucault, it is an original work of philosophy, extending ideas found in his 2007 This Is Not Sufficient. Somewhat disguised by the expositions, From Violence to Speaking Out is primarily a work in ethics.

List of deconstructionists