Since the late middle ages man, in the “West,” has spent himself in one or both of two opposing activities. His life has been spun out either filling or killing time. The former we have come to call, commonly, work; the latter idleness. By whichever of these morally conflicting or complementary ways he has shaped his life, occidental man has made a single affirmation which unites both extremes: he has tacitly or explicitly affirmed that time is the framework of existence. The point of my paper is to attempt to show that this is no longer so. Evidence will be adduced to demonstrate that dimensions of existence, “categories,” more meaningful than time are now competing to displace it as the mould or form in which life is filled out with meaning. These currents of understanding, now increasingly evident, must necessarily be thought of as substitutionary and oppositional to that in which time was preeminent, because they place the emphasis on a perspective which greatly reduces the significance of time, indeed one which tends to eliminate it altogether, inasmuch as this is possible in a world still largely governed by sunrise and sunset, the process of aging, and so on. Time gained its ascendency in an epoch characterized by man's imperial conquest of nature, or his externalization, effected substantially, through reason and work. The shadow of time's eclipse can be made out where interiorization and assimilation of the objective world have become the predominant preoccupations. In three steps we shall attempt to look at 1) the characteristics of the epoch in which existence was circumscribed by time; 2) the revolt against time and its conditions as typified in the writings of J.-J. Rousseau; 3) some signs of the current growth of this trend in the West, or should I say more precisely, in the technical societies.