ELLIOTT JAQUES is Research Professor of Management Science, Department of Management, George Washington University, and Professor Emeritus of Social Science at Brunel University, England. He holds an M.D. from Johns Hopkins, a Ph.D. from Harvard, and is a member of the British Psycho-Analytical Society. Dr. Jaques was cited by (then General) Colin Powell for . . . his outstanding contribution in the field of military leadership theory and instruction. . . . He is author of numerous articles, in one of which he created the concept of the mid-life crisis, and more than 20 books, among them The Life and Behavior of Living Organisms, published by another imprint of Greenwood Publishing Group, Praeger Publishers.