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Quadragesimo Anno: Encyclical of Pope Pius XI on Reconstruction of the Social Order (15 May 1931)

Pius XI · Holy See · 1931

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Pius XI
Accessed
2026-09-01

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EstablishedPius XI's encyclical Quadragesimo Anno (1931) formulated the modern principle of subsidiarity, describing it as an injustice and a disturbance of right order to assign to a greater and higher association what lesser and subordinate organisations can do.