How did Satan become prince of this world?

Satan became known as the "prince of this world" primarily through his rebellion against God and the subsequent fall from grace, as narrated in various biblical texts. His influence grew following humanity's disobedience in the Garden of Eden, which allowed him to exert his power over the world. This title signifies his role in promoting sin and leading people away from God, particularly in the context of spiritual warfare and temptation. Ultimately, the concept underscores the ongoing struggle between good and evil within the world.