Social theories in the context of "Contingency (philosophy)"

Essentialism is the view that objects have a set of attributes that are necessary to their identity. In early Western thought, Platonic idealism held that all things have such an "essence"—an "idea" or "form". In Categories, Aristotle similarly proposed that all objects have a substance that, as George Lakoff put it, "make the thing what it is, and without which it would be not that kind of thing". The contrary view—non-essentialism—denies the need to posit such an "essence". Essentialism has been controversial from its beginning. In the Parmenides dialogue, Plato depicts Socrates questioning the notion, suggesting that if we accept the idea that every beautiful thing or just action partakes of an essence to be beautiful or just, we must also accept the "existence of separate essences for hair, mud, and dirt".

Older social theories were often conceptually essentialist. In biology and other natural sciences, essentialism provided the rationale for taxonomy at least until the time of Charles Darwin. The role and importance of essentialism in modern biology is still a matter of debate. Beliefs which posit that social identities such as race, ethnicity, nationality, or gender are essential characteristics have been central to many discriminatory or extremist ideologies. For instance, psychological essentialism is correlated with racial prejudice. Essentialist views about race have also been shown to diminish empathy when dealing with members of another racial group. In medical sciences, essentialism can lead to a reified view of identities, leading to fallacious conclusions and potentially unequal treatment.

In politics, integralism, integrationism or integrism (French: intégrisme) is an interpretation of Catholic social teaching that argues the principle that the Catholic faith should be the basis of public law and public policy within civil society, wherever the preponderance of Catholics within that society makes this possible. Integralism is anti-pluralist, seeking the Catholic faith to be dominant in civil and religious matters. Integralists uphold the 1864 definition of Pope Pius IX in Quanta cura that the religious neutrality of the civil power cannot be embraced as an ideal situation and the doctrine of Leo XIII in Immortale Dei on the religious obligations of states. In December 1965, the Second Vatican Council approved and Pope Paul VI promulgated the document Dignitatis humanae—the council's "Declaration on Religious Freedom"—which states that it "leaves untouched traditional Catholic doctrine on the moral duty of men and societies toward the true religion and toward the one Church of Christ". However, they have simultaneously declared "that the human person has a right to religious freedom," a move that some traditionalist Catholics such as Archbishop Marcel Lefebvre, the founder of the Society of St. Pius X, argue is at odds with previous doctrinal pronouncements.

The term is sometimes used more loosely and in non-Catholic contexts to refer to a set of theoretical concepts and practical policies that advocate a fully integrated social and political order based on a comprehensive doctrine of human nature. In this generic sense some forms of integralism are focused purely on achieving political and social integration, others national or ethnic unity, while others were more focused on achieving religious and cultural uniformity. Integralism has, thus, also been used to describe non-Catholic religious movements, such as Protestant fundamentalism or Islamism. In the political and social history of the 19th and 20th centuries, the term integralism was often applied to traditionalist conservatism and similar political movements on the right wing of a political spectrum, but it was also adopted by various centrist movements as a tool of political, national and cultural integration.