In 1921, he returned home and, encouraged by the political and social turn of events in Mexico, he was drawn by the vast popular education programme for which he, through commissions for his murals, was to become the prime instrument of propagation. ###>En 1921, retour au pays, encouragé par l'évolution politique et sociale du Mexique où l'attire le vaste programme d'éducation populaire dont il va devenir, avec les commandes de peintures murales, le principal instrument de propagation.