Various social contract theories have been proffered to establish state legitimacy and to explain state formation. Common elements in these theories are a state of nature that incentivizes people to seek out the establishment of a state. Thomas Hobbes described the state of nature as "solitary, poor, nasty, brutish, and short" ("Leviathan", Chapters XIII–XIV). Locke takes a more benign view of the state of nature and is unwilling to take as hard a stance on the degeneracy of the state of nature. He does agree that it is equally incapable of providing a high quality of life. Locke argues for inalienable human rights. One of the most significant rights for Locke was the right to property. He viewed it as a keystone right that was inadequately protected in the state of nature. Social contract theorists frequently argue for some level of natural rights. In order to protect their ability to exercise these rights, they are willing to give up some other rights to the state to allow it to establish governance. Ayn Rand argues that the only right sacrificed is the right to vigilante justice, thus individuals preserve full autonomy over their property. Social contract theory then basis government legitimacy on the consent of the governed, but such legitimacy only extends as far as the governed have consented. This line of reasoning figures prominently in The United States Declaration of Independence.