Thus, when the decolonization movement was slowly beginning to emerge in the whole world, he attempted in 1956 to convince Tunisian leader Habib Bourguiba to obtain independence without using violence. Present in various international conferences at the end of the 1950s, he met Colombian priest Camilo Torres (1929–1966), a predecessor of Liberation theology, who asked for his advice on the Colombian Church's criticism of "workers' priests." He was also received by US president Eisenhower and Mohammed V of Morocco in 1955 and 1956.