"Once, according to some sources, back in the Stone Age, the Indo-Europeans discovered knowledge of universal law - the highest universal principle that determines the existence of the entire universe. As their community disintegrated, various Indo-European peoples carried the light of this knowledge, according to which they built all their lives, across the vast expanses of Eurasia from Ireland to India and from Russia to Greece. Under the influence of the inexorable Blood-time, the memory of this supreme principle gradually weakened, and the Christianity and Islam that arose later did everything to make people forget forever the very fact of its existence. This book is the first attempt in Russian science to restore the idea of ​ ​ universal law both in Ancient Russia and among the Indo-Europeans and the era of their community.