The article addresses legal issues, and more specifically, the genesis of law, the establishment of essential features and patterns of its formation and development. The analysis takes into account not only practical and scientifically grounded peculiarities of the legal realm in the historical or modern perspective, but also the “acquired” material of the anthropology, sociology, philosophy; it also takes into account the data of biology and techno-humanistics, which indicates the interdisciplinary nature of the presentation. The paper considers selective social communications characteristic of proto-communities in order to pay attention to the natural and social characteristics of a person and to demonstrate their influence on the functioning of the human mind, namely, the principle of reasonable selection, true and objective in its nature. This principle served as the basis of rational deduction and reduction of non-viable behavior patterns destructive for social existence and development. With the help of the same principle, the greatest imperatives were created for the humanity as a whole, later embodied in moral, religious dogmas, natural law, etc. But most importantly, they ensured preservation of human nature. Some provisions are given that it was reasonable selection at a certain historical stage of human development that showed the law based on preservation of human nature and implemented solely under state (institutional) regulation of public relations as the only civilized instrument for preserving human nature that can act as an effective and safe regulator. Based on the analysis of the historical adaptation of humans, as well as modern challenges set forth by scientific and biotechnological progress and problems associated with gender identity and sexual orientation of a person, the position is defended that human nature, especially at the present stage of its development, needs to be protected precisely through law.
