On invitation by the editors of The Saturday Evening Post, the following distinguished writers have surveyed and appraised the most significant advances in knowledge in the twentieth cenlury: LOREN EISELEY JACQUES BARZUN WILLIAM S. BECK PAUL TILLICH J. ROBERT OPPENHEIMER EDITH HAMILTON ALDOUS HUXLEY ARTHUR M. SCHLESINGER. EDITH SITWELL D. W. BROCAN HANS SELYE "What can this book do for us? It can do three things: it can stir us, it can delight us,'it can inform us. And all three are aspects of learning, which is not the least noble of man's impulses on earth.. . . Try to reconcile all the statements in all these essays and you will see its triumph still far, far around any known corner of our magnificently curious world." —from The New York Times