Vladimir Jankélévitch (1903-1985) held the chair in moral philosophy at the University of Paris-Sorbonne from 1951 to 1978, and was the author of more than twenty books on philosophy and music.

Alexandre Lefebvre is Senior Lecturer in the Department of Government and International Relations and the Department of Philosophy at the University of Sydney. He is the coeditor of Bergson, Politics, and Religion, also published by Duke University Press.

Nils F. Schott is James M. Motley Postdoctoral Fellow in the Humanities at Johns Hopkins University and the translator of several books, including The Helmholtz Curves: Tracing Lost Time, by Henning Schmidgen.