I agree with the argument of the David-Moore thesis since social inequality is important for letting people perform their own roles in the society. Without it, there would be no leader to guide the group on what decisions to make. It creates the balance in the society.
Epinephrine during stresses
A behavior that violates significant social norms is called : deviance
Yes.
Language affects the way we think about things. Different languages embed diferent values and perspectives, so knowing more than one langage tends to help a person think about things in more than one way.