"This is unnatural!" - perhaps the most common objection to everything new, especially if it affects human psychology and behavior. What does “natural” mean? Everyone will probably agree that it is natural for fish to live in water and breathe through gills. Therefore, when the first Paleozoic lobe-finned fish crawled onto land and tried to breathe atmospheric air, it was terribly unnatural for them. We don't know how many thousands or millions of them died, but those that survived gave rise to all land vertebrates, including us. It was natural for our later ape-like ancestors to walk on all fours. How unnatural walking upright was for them can be judged if only because over millions of years we still have not adapted to it. Many of our illnesses and problems, from difficult childbirth to many diseases of the circulatory system, are associated with upright posture. And yet, what we acquired in return is worth such a price, isn’t it? How should we treat what is unnatural for us now? Like an opportunity that we still know little about. Some changes may give us nothing, or even lead to death. Others - to give rise to a new round of evolution. Evolution is not just about survival: simple forms of life are more resilient than complex ones. This is a search for new opportunities, new enjoyment of life. This means that what is truly natural is not what is familiar, but what corresponds to the direction of evolution: it leads to greater enjoyment of life and new possibilities for its manifestation..