I. Haeckel and His Opponents

The natural course of evolution leads the processes of Nature upwards to human self-consciousness. On that level it leaves man to himself; henceforward he can draw the impulses of his action from his own spirit. If a universal world-reason were ruling, then man also could not draw his goals from within himself, but only from this eternal reason. In the monistic sense man's action is hereafter determined by causal moments; in the ethical sense it is not determined, because Nature as a whole is determined not ethically but in accordance with natural law. The preliminary stages of ethical conduct are already to be found among the lower organisms. “Even though later the moral foundations have in man developed themselves much more highly, nevertheless their most ancient, prehistoric source lies, as Darwin has shown, in the social instincts of the animals” (Haeckel, Monism, p. 29).