Evolutionary psychology is founded on several core premises.
1.The brain is an information processing device, and it produces behavior in response to external and internal inputs.
2.The brain's adaptive mechanisms were shaped by natural and sexual selection.
3.Different neural mechanisms are specialized for solving problems in humanity's evolutionary past.
4.The brain has evolved specialized neural mechanisms that were designed for solving problems that recurred over deep evolutionary time,
 giving modern humans Stone age minds.
5.Most contents and processes of the brain are unconscious;
and most mental problems that seem easy to solve are actually extremely difficult problems that are solved unconsciously by complicated neural mechanisms.
6.Human psychology consists of many specialized mechanisms, each sensitive to different classes of information or inputs.
These mechanisms combine to produce manifest behavior.