Homo sapiens has achieved an ever-increasing hand skill in the vicinity of East Africa. The more those hands could do, the more successful their owners were, so the evolutionary pressure led to an increasing concentration of nerves and highly accurate muscles in thumb and fingers. The brain grew along with it. As a result, people can perform particularly complex tasks with their hands.Homo sapiens also has its reproductive organs within reach. Halfway through the twentieth century, modern man has gotten his reproductive processes under control. Subsequently, man began to apply manual insemination to livestock farming and meat is still produced exclusively by artificial insemination. Intensive livestock farming has brought us new zoonoses by spreading RNA leukemia viruses. At the same time, the number of cancer diseases is on the rise and cancer is now the main cause of chronic diseases and premature death in the elderly. Cardiovascular diseases are in second place and are also the result of over-consumption and fast food.Global warming is largely the result of intensive animal husbandry
