For instance, classical liberalism (also known as laissez-faire liberalism ,  ) is a doctrine stressing individual freedom and limited government . This includes the importance of human rationality, individual property rights , free markets , natural rights , the protection of civil liberties , constitutional limitation of government, and individual freedom from restraint as exemplified in the writings of John Locke , Adam Smith , David Hume , David Ricardo , Voltaire , Montesquieu and others. According to the libertarian Institute for Humane Studies , "the libertarian, or 'classical liberal,' perspective is that individual well-being, prosperity, and social harmony are fostered by 'as much liberty as possible' and 'as little government as necessary.'"  For anarchist political philosopher L. Susan Brown "Liberalism and anarchism are two political philosophies that are fundamentally concerned with individual freedom yet differ from one another in very distinct ways. Anarchism shares with liberalism a radical commitment to individual freedom while rejecting liberalism's competitive property relations."