“If two individuals enter into a contract to commit trespass, theft, robbery or murder upon a third, the contract is unlawful and void, simply because it is a contract to violate natural justice, or men’s natural rights.” (h/t Bill Buppert)
Which is what I have been saying:
"No contract which by its very nature violates Rightful Liberty can ever be valid. You are not obligated to abide by it and you are not a bad guy merely by breaking it." (link)
I had never read this quote of Spooner's before. Yet I came up with the same principle simply by thinking about a question. I have seen the same thing happen so many times, with so many other ideas.
Truth will always be independently discovered. Over and over again. Until it finally becomes something "everyone knows".