Conservatism is a cultural, social, and political philosophy that seeks to promote and to preserve traditional institutions, practices, and values. The central tenets of conservatism may vary in relation to the culture and civilization in which it appears. In Western culture, depending on the particular nation, conservatives seek to promote a range of social institutions such as the nuclear family, organized religion, the military, property rights, and monarchy. Conservatives tend to favor institutions and practices that guarantee stability and evolved gradually. Adherents of conservatism often oppose certain aspects of modernity (for example mass culture and secularism) and seek a return to traditional values, though different groups of conservatives may choose different traditional values to preserve.

The first established use of the term in a political context originated in 1818 with François-René de Chateaubriand during the period of Bourbon Restoration that sought to roll back the policies of the French Revolution. Historically associated with right-wing politics, the term has since been used to describe a wide range of views. There is no single set of policies regarded as conservative because the meaning of conservatism depends on what is considered traditional in a given place and time. Conservative thought has varied considerably as it has adapted itself to existing traditions and national cultures. For example, some conservatives advocate for greater economic intervention, while others advocate for a more laissez faire free-market economic system. Thus, conservatives from different parts of the world—each upholding their respective traditions—may disagree on a wide range of issues. Edmund Burke, an 18th-century politician who opposed the French Revolution but supported the American Revolution, is credited as one of the main theorists of conservatism in the 1790s.