Social exclusion is the process in which individuals or people are systematically blocked from (or denied full access to) various rights, opportunities and resources that are normally available to members of a different group, and which are fundamental to social integration and observance of human rights within that particular group (e.g., housing, employment, healthcare, civic engagement, democratic participation, and due process).

The United Nations Minorities Declaration in its article 1 refers to minorities as based on national or ethnic, cultural, religious and linguistic identity, and provides that States should protect their existence. There is no internationally agreed definition as to which groups constitute minorities. It is often stressed that the existence of a minority is a question of fact and that any definition must include both objective factors (such as the existence of a shared ethnicity, language or religion) and subjective factors (including that individuals must identify themselves as members of a minority).