I don't see how tariffs are not theft.
If I live in America and I wanna trade with someone in Japan. And I have to pay a tariff at some imaginary line between us I can not see how that's not theft. (this is in the situation of a voluntary world)
The government does not own the land where people are living nor does it own the lines it has drawn on a piece of paper pretending it to be real "borders".

The government does not own anything. The government does not exist. It's a concept, concepts can not own anything.
If a group of individuals decides to keep voting and pay voluntary taxes and buy a piece of land within "the old America) than they own only that land (they can call it America if they want and install tarrifs, but they can not claim the whole of America, and say because the government "owned" the whole of America before, we the voluntary taxpayers own the whole country now.