Rationalism of human nature demands to know the moral foundations and legitimacy made by human decisions and actions. This norm directs to the human nature, since a man first of all he wants – and should – be a man what means to pursue contained in its nature objectives and capabilities. This fact calls for the recognition of human nature, which is the ontological foundation of ethical norms of human action. This problem becomes more timely in the context of the development of modern civilization and cultural, scientific and technological progress and the growth of the needs and possibilities of their fulfillment. The consequence of these changes is deepening differentiation of human action evaluation and justification of ethical standards....