Great point! Except that the study of human behavior is used to manipulate humans, such that these successful instincts are actually not optimal or do not benefit the person in many situations. That in itself is part of social evolution, which in itself is studied, which itself is part of social evolution...
For more information on this, look up Edward Bernays, "The Engineering of Consent"
From Wikipedia:
The Engineering of Consent" is an essay by Edward Bernays first published in 1947.[citation needed] He defines "engineering consent" as the art of manipulation of people; specifically, American citizen, who are described as "fundamentally irrational people... who could not be trusted." It maintained that entire populations, which were undisciplined or lacking in intellectual or definite moral principles, were vulnerable to unconscious influence so as make them want things that they do not need. This was achieved by linking those products and ideas to their unconscious desires. Ernest Dichter, who is widely considered to be the "father of motivational research," referred to this as "the secret-self of the American consumer."
