The answer is Political model.
The correct answer is Sigmund Freud. His studies on psycho-neuroses around the 20th century is considered to be the basis of psychology and psychiatry.
It is naturalization
At least eighteen years old.
A lawful permanent resident of the United States.
Resident and physically present in the United States for at least five years at the time of application.
Of good moral character.
And do a oath of allegiance
