was Islam there b4 4000 years ago?
Machan, A Muslim does not mean a person following Islam
Ex - Christain following the Christianity.
A muslim, means a person who believes in 1 God who has no partners or etc. This is known as Monethestic Religon.
So, there are several Prophets who preached this such as Adam, Nuh, Abraham and Moses.
However, We muslims (and also Jews and majority of Christain) believe that Abraham was one of the greatest prophets and the one who succesfully preached the concept of One God.
So, from time to time, Islam was called by different names by different prophet depending on their language !