Blackstone agrees, but the part of natural law that operates in the jungle, among animals, birds, and insects, has no application in deciding issues that arise among people and groups of people.
Blackstone says there is a body of natural law that applies to human interaction. Unfortunately, it is up to humans to discover this law. He cites three principles, live honestly, hurt nobody, render to every one it's due.
That is Blackstone's wishful thinking, or projection. Natural law would be silent on those principles, because they do not exist in natural law. That is why man sought to establish them.