António Sérgio de Sousa (September 3, 1883 – February 12, 1969) was an influential educationist, philosopher, journalist, sociologist and essayist from Portugal.
He lived many years in Africa, becoming a cosmopolitan character because, following a family tradition, he studied at the Military College, in Lisbon, Portugal completing the course of the Navy of War, after which he traveled to Cape Verde and Macao, China.
Sérgio was located in a social democratic political line, admiring England, a position similar to the one adopted by the countries of Scandinavia and their Social-Democratic Parties.
He was a personal friend of Adolphe Ferrière, Claparède and Paul Langevin - the doctoral advisor of Louis de Broglie (Nobel Prize for Physics in 1929); he was teacher, including at the University of Santiago de Compostela (in 1933) and, by all this, influenced characters as his friend Barahona Fernandes - one of the most distinguished Portuguese psychiatrists - the architect Raul Lino, the Educator Rui Grácio and Mário Soares.
Most of the political activity of Sérgio is always compatible with its theoretical aspect - the linking of democracy and freedom as means for Education and Culture.