Born in Belgium in 1923, Joseph Comblin was ordained to the priesthood in 1947.
In 1961, he published a famous book "Echec de l'Action catholique?" ( Failure of Catholic Action?), which was widely interpreted as a critique of the Cardijn movements.
Nevertheless, Comblin went to work first in Chile from 1962-65 and then to Brazil at the invitation of Dom Helder Camara.
He became a YCW chaplain in Campinas, Brazil.
Later he became known as a theologian of liberation.
He died in 2011.
José Comblin (Wikipedia.fr)