Nothing stays fixed very long in our world. Change is the natural context of our lives. Some would claim that it is the very philosophical climate of the times. The spontaneous operation of the modern consciousness is to strain anxiously toward the possible, the not-yet. This is now so habitual a stance that we sometimes forget it is a relatively recent one. It is our principal heritage from the nineteenth century. Before then, change had never been experienced as 50 vital a factor in cultural life. That century, if we agree with J. S. Mill, was marked by a transition from a prevailing worldview that was relatively static and timeless to one predicated upon constant and even violent change.