Human beings are reasoning agents. To become a virtuous human being is, in part, to attain excellence in the exercise of practical reason. So humans need liberties, powers, and opportunities to exercise practical reason. The common law provides for those needs by securing the dominion of property owners over the resources under their possession and control. But the freedom afforded by property dominion is also opportunity to act badly and to become vicious. So the common law places boundaries around dominion with the law of wrongs. The common-law boundaries around dominion simultaneously deflect vicious uses of property that would cause moral harm to the owner and secure the rights of other owners within their domains.