George Agostinho Baptista da Silva, GCSE (; Porto, 13 February 1906 – Lisbon, 3 April 1994) was a Portuguese philosopher, essayist, and writer. His thought combines elements of pantheism and millenarism, an ethic of renunciation (like in Buddhism or Franciscanism), and a belief in freedom as the most important feature of man. Anti-dogmatic, he asserts that truth is only found in the sum of all conflicting hypothesis (in paradox). He may be considered a "practical philosopher", living and working for a change in society, according to his beliefs.