The Tanner Lectures on Human Values July 2014 View on Publisher Site HKS Authors See citation below for complete author information. Frances Kamm Littauer Professor of Philosophy and Public Policy, Emerita Citation Kamm, Frances. "'Who Turned the Trolley?' and 'How Was the Trolley Turned?'." The Tanner Lectures on Human Values. Ed. Mark Matheson. University of Utah Press, July 2014.