The movements which have arisen in the Modern Age have led to a radical change in our treatment of this question: this change is chiefly due to science. Modern science breaks down the authority of the immediate impression, and, in contrast with it, projects a new representation of the world. Man is no longer looked upon as occupying a position of lonely elevation, but is seen to be in the closest concatenation with nature around him, and is regarded, finally, as a mere part of its machinery. Many movements of thought tend toward this conclusion and support one another. The physical relationship which exists between man and the animals could not have been so clearly perceived, and traced with such exactitude of detail by modern science had not the fixed boundaries, which in our representation had hitherto divided the life of the human soul from that of the animals, been abolished. The new view was further supported by the results of a keener investigation into the nature of psychical life, since in this investigation the traditional conception was analysed into its individual constituents, and it was sought to explain from their combinations even the highest spiritual achievements. The result of this modification of ideas was that the inner life of man was assimilated much more closely to nature than before; the juxtaposition and the succession of occurrences gained in significance; it was recognised that relations did not hold from the beginning but are developed gradually. The forces and impulses which were operative in this development seemed to have arisen from an actual process of nature, without any co-operation of human caprice. Our psychical life appeared to be nothing more than a continuation of nature. The great divergence between the heights attained in experience, and the theories that were formulated to account for them, caused no misgivings because the idea of a gradual evolution during an indefinite period of time was sufficient to bridge the widest gulf. At the same time the conception of society allied itself with that of history and lent its support to the general tendency. Every higher aspect of life that was accepted formerly as a proof of a supernatural order now became a witness to historico-social relationship and, with its new interpretation, lost its old mysteriousness. All this was, of course, only on the assumption that human life brings nothing essentially new with it. Not the least doubt as to the validity of this assumption came to those who entered upon this train of thought.