Institutions are structures and mechanisms of social order and cooperation governing the behavior of a set of individuals. Institutions are identified with a social purpose and permanence, transcending individual human lives and intentions, and with the making and enforcing of rules governing cooperative human behavior. The term, institution, is commonly applied to customs and behavior patterns important to a society, as well as to particular formal organizations of government and public service. As structures and mechanisms of social order among humans, institutions are one of the principal objects of study in the social sciences, including sociology, political science and economics. Institutions are a central concern for law, the formal regime for political rule-making and enforcement. The creation and evolution of institutions is a primary topic for history.

Aspects of Institutions

Although unindividual, formal organizations, commonly identified as "institutions," may be deliberately and intentionally created by people, the development and functioning of institutions in society in general may be regarded as an instance of emergence; that is, institutions arise, develop and function in a pattern of social self-organization, which goes beyond the conscious intentions of the individual humans involved.

As mechanisms of social cooperation, institutions are manifest in both objectively real, formal organizations, such as the U.S. Congress, or the Roman Catholic Church, and, also, in informal social order and organization, reflecting human psychology, culture, habits and customs. Most important institutions, considered abstractly, have both objective and subjective aspects: examples include money and marriage. The institution of money encompasses many formal organizations, including banks and government treasury departments and stock exchanges, which may be termed, "institutions," as well as subjective experiences, which guide people in their pursuit of personal well-being. Powerful institutions are able to imbue a paper currency with certain value, and to induce millions into cooperative production and trade in pursuit of economic ends abstractly denominated in that currency's units. The subjective experience of money is so pervasive and persuasive that economists talk of the "money illusion" and try to disabuse their students of it, in preparation for learning economic analysis.

Marriage and family, as a set of institutions, also encompass formal and informal, objective and subjective aspects. Both governments and religious institutions make and enforce rules and laws regarding marriage and family, create and regulate various concepts of how people relate to one another, and what their rights, obligations and duties may be as a consequence. Culture and custom permeate marriage and family. In the United States and western Europe, a transition from a conception of marriage, as license for sexual intercourse granted by Church and State, to a conception of marriage as a form of contract, freely entered into, has occasioned momentous social and political controversies regarding laws and customs governing the freedom of women, divorce, cohabitation outside marriage, contraception, and homosexuality.