Your human rights are yours because you are human, they don't derive from any social contract, they are not granted by society. Society can only respect them or violate them, not give them to you.
You might wonder what are your human rights then? The answer is easy, is what you were born with: Freedom and Property.
Freedom because you have a will, and you can do what you want if no-one hinders you. Property because you were born with your body, it's your to do with it as you please.
Any other so-called rights that violate these two fundamental rights are false rights. The "right to eat your neighbour" could never be a real right because it presupposes that you can eat them no matter what, you wouldn't need their consent in order for you to eat them and that would violate their freedom.
Actually, there is a bunch of other false rights that are in the same line as your "right to eat your neighbours": the right to food, the right to health-care, the right to housing, the right to anything that requires someone else's labor. Saying that such things are a right imply that someone else has to labor in order to grant said false rights to you. The "has to" part violates someone's freedom. We have a name for that: slavery.