Property

Property is the scarce things that you own. Property starts with your body. It extends to each thing that you were the first to use when no agent owned it, or that you got by voluntary transfer. Only scarcity makes a thing property: two agents cannot use the same thing at the same time. Thus one agent must have the control, and first use or transfer shows which agent. To make a thing alone gives no ownership. To share an idea loses no thing, and a thing that you made from the material of a different agent stays theirs. To steal property is harm. You alone control it: that follows from natural rights, from logic.