Élan vital (French): the urge or impulse that is an essential part of all human life; the fundamental source of human action. Term used by the philosopher, Henri Bergson, for the source of efficient causation and evolution of human life that passes from generation to generation.
- Percy L. Greaves, Jr. "Mises Made Easier ", 1974. Referenced 2014-07-10.
- Élan vital at Wikipedia