Institutionalisation (or institutionalization) refers to the process of embedding some conception (for example a belief, norm, social role, particular value or mode of behavior) within an organization, social system, or society as a whole. The term may also be used to refer to committing a particular individual or group to an institution, such as a mental or welfare institution. The term may also be used in a political sense to apply to the creation or organisation of governmental institutions or particular bodies responsible for overseeing or implementing policy, for example in welfare or development.
In the United States and most other developed societies, severe restrictions have been placed on the circumstances under which a person may be committed or treated against their will as such actions have been ruled by the United States Supreme Court and other national legislative bodies as a violation of civil rights and/or human rights (see e.g. O'Connor v. Donaldson). Thus a person is rarely committed against their will and it is illegal for a person to be committed for an indefinite period of time.
During the period of the industrial revolution in Europe many countries went through a period of "institutionalization", which saw a large expansion and development of the role of government within society, particularly into areas seen previously as the private sphere. Institutionalization is also seen as being an important part of process of modernization in developing countries, involving again the expansion and improved organisation of government structures.
During the period from 1850 to 1930 many types of institutions were created by public subscription, Parliament and local authorities to provide housing, healthcare, education, and financial support for individuals in need. At the upper end of the scale, public boarding schools such as Eton and Harrow were founded or greatly extended to meet the growing demand for the education of the children of those in colonial service overseas. These were seen as models of social improvement, and many inferior imitations followed for the lower social orders. Virtually every borough in the UK was required by legislation to make provision for paupers, homeless, released prisoners, convicted criminals, orphans, disabled war veterans, older people with no means of support, deaf and blind schools, schools and colonies for those with learning disabilities or mental health problems.