These living systems may range from microscopic cells to large biospheres. Though physiology only rose to prominence during Ancient Greek times, one could infer that Neolithic Man used a more primitive form of physiology to assign roles when he had started domesticating animals. Horses have strong legs, they shall carry me. Sheep have thick wool, they shall clothe me. Cows have rich milk and good meat, they shall feed me - and so on. Man on the other hand had little himself to offer, he is not strong enough to carry other animals, his body hair is sufficient only for keeping himself warm, and woman produces only enough milk to feed her own offspring. Amidst all these inadequacies however, a thought must have occurred to man. He was not the fastest, or the strongest, but he had the unique ability to tame other animals and think critically. He could build tools to compensate for his lack of strength, he could ride mounts to increase his speed. He had a mind like no other creature and an adaptability that trumped any physical quantity. Another field of natural science, Genetics, analyzes the biological structure unique to living things. Genetics tells us that this preconceived notion of human uniqueness and superiority is true. It tells us that our role in nature is indeed that of the surveyor and the leader. Genetics can tell us how our minds and bodies function physically. For instance up until 2012, experts held the belief that pedophilia was merely a preference for children and not a disorder. Homosexuality in the sixties was thought to be a choice and curable, we now know that it is indeed a genetic trait. Genetics in essence give us a sense of what causes us to do things on a molecular level. .
Genetics and physiology however, cannot fully predict human behavior. As stated previously, homosexuality is said to be genetic. Recent studies by behavioral scientists however have unearthed data that reveal an individual's surroundings play a key role in determining sexual orientation.
