In that distant time, when the ancient Indo-Europeans began to perceive the world around them as a harmonious system, they began to determine a place in it for themselves and their society. Understanding the Universe as the embodiment of harmony and unity, opposite to chaos, the Indo-Europeans believed that this order is necessarily governed by a single law that moves the entire universe, and with it gods and people. It is extremely difficult for modern people to imagine this comprehensive pagan principle. The great spiritual impulse was so enormous that the light of truth shone for many centuries and even continued its influence after the collapse of the Indo-European unity, when individual peoples of the great linguistic family settled across a good half of Eurasia.