Yes, it does. It is a cultural and social construct just like gods.
No, it's not, but you have the free will to think so.
Edit: As least e.g. some if not all Muslims don't believe in it. The belief in free will is a cultural and social construct.
Not true according to Why Islam?
When you then check it, you find out that you can explain human behavior without free will and it doesn't contradict causation.
I guess you can, but it's a wrong explanation, then.
Physics -> chemistry -> biochemistry/biology -> humans -> ?free will? Free will breaks the causation, because it comes out of nowhere; i.e. Ex Nihilo.
Evolution is not ex nihilo.