Exactly, because in the jungle there are no rights
Oh, I get it now. You think that human beings aren't any different in their cognitive abilities, capacity for reason, and ability to think abstractly and communicate than are, say, tigers or lemurs.
I don't need it, but I need a government to tell others that.
No, you can tell them yourself, and if they are too irrational to digest the concept, and you're too weak to defend against violent, irrational people, then you need a government to help you protect your rights.