"Two Treatises on Government" 1690. Rejected divine-right theories of monarchical rule, argued that the legitimacy of govt rests on the consent of the governed and that individuals have inalienable natural rights to life, liberty and property. A ppl should have the right to change govt policies, or even the form of govt, through the decision of a majority. Lasting influence in America. Enlightenment: "Essay Concerning Human Understanding" 1690 emphasized the impact of environment, experience, and reason on human behavior. Character of individuals and societies was not fixed but could be changed through edu and purposeful action.