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Human nature is influenced by genetics and environment from "summary" of Man, the Unknown by Alexis Carrel
The behavior of man depends on his heredity and on the environment in which he lives. The characteristics of the species are transmitted by heredity. They are due to the arrangement of the chromosomes and to the genes. These elements are transmitted by the parents to the offspring. The characteristics of the species are remarkably constant. They reproduce themselves in the descendants. The environment in which man lives acts upon him. It modifies his behavior, his intelligence, and his body. The organism is adapted to the conditions of life. It reacts to them by various mechanisms. The influence of the environment on man is direct and profound. It acts upon him through his senses. It affects his nervous system, his endocrine glands, his muscles, and his cells. Man is capable of adapting himself to the most varied conditions. He can live in the Arctic or in the tropics. He can follow a sedentary or a nomadic life. He can be a hunter, a fisherman, a farmer, or an industrial worker. The environment acts upon man through his mind. It creates his language, his customs, his beliefs, and his values. It influences the development of his intelligence, his character, and his personality. The environment acts upon man through his bo...
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