According to Phelps, Pope Leo XIII advocated a corporatist view in his 1891 encyclical Rerum Novarum, and Pope Pius XI amplified these ideas in his 1931 encyclical Quadragesimo Anno.
Podle Phelpse korporativistický náhled obhajoval roku 1891 papež Lev XIII. v encyklice Rerum Novarum a papež Pius XI. tyto úvahy ještě v encyklice Quadragesimo Anno roku 1931 umocnil.