Alceu Amoroso Lima (Petrópolis, December 11, 1893 – Rio de Janeiro, August 14, 1983) was a writer, journalist, activist from Brazil, and founder of the Brazilian Christian Democracy.

Born into a middle-class family in Rio, Alceu Amoroso Lima was "atheist and Jacobin" studying at college Pedro II, obtaining a law degree in 1913.

He was secretary of the Catholic Electoral League, created by the Cardinal Archbishop of Rio Sebastião Leme da Silveira Cintra to act in the political sphere (without a party) with the approach of elections in 1933.

In 1930 Amoroso Lima was close to Brazilian Integralism, the fascist movement of Plínio Salgado; he parted under the influence of Jacques Maritain, with whom he corresponded.

[2] Alceu Lima was one of the founders of the Christian Democrat Organization of America (ODCA) in 1947, alongside, among others, the future Chilean President Eduardo Frei Montalva.