Tarrin Lupo illustrates as plain as day the difference between taxation and voluntary exchange. It’s so easy, your kids can get it. One variant Tarrin didn’t cover that trips up some critics of liberty is when a person incurs an obligation and can be forced to make good on it. For example, if you hurt someone else or damage their property, you have voluntarily given up that part of your own property required to make the victim whole. That is not coercion. Likewise, if you join a residential community and the contract includes an agreement to pay for the upkeep of common areas, your obligation to pay is voluntary. It is not forced because you voluntarily took on the debt.