Personalism is an intellectual stance that emphasizes the importance of human persons. Personalism exists in many different versions, and this makes it somewhat difficult to define as a philosophical and theological movement. Friedrich Schleiermacher first used the term personalism in print in 1799. One can trace the concept back to earlier thinkers in various parts of the world.

Jacques Maritain was a French Catholic philosopher. Raised as a Protestant, he was agnostic before converting to Catholicism in 1906. An author of more than 60 books, he helped to revive Thomas Aquinas for modern times, and was influential in the development and drafting of the Universal Declaration of Human Rights. Pope Paul VI presented his "Message to Men of Thought and of Science" at the close of Vatican II to Maritain, his long-time friend and mentor. The same pope had seriously considered making him a lay cardinal, but Maritain rejected it. Maritain's interest and works spanned many aspects of philosophy, including aesthetics, political theory, philosophy of science, metaphysics, the nature of education, liturgy and ecclesiology.