Bartolome de las Casas was born in Seville in 1484 and died in Madrid in 1566, he lived over twenty years in America: a good part of his youth and adult life. He traveled to India for the first time in 1502; his last American adventure, and as Bishop of Chiapas, took place between 1543 and 1547 He dedicated more than fifty years, there and in Spain, the defense of the indigenous Amerindians. For the Spanish conquistadores and encomenderos was a gadfly to annoy not stop with memorials, relationships, pamphlets and tracts. For monarchs was an authoritative voice that, with time and age, it would becoming an awkward obstacle first. For the ecclesiastical power and the Inquisition of the time, a virtuous man, with influential friends in the Council of the Indies, which, for that reason, not easy to silence. For lawyers and courtiers friends conquerors and encomenderos was an intriguing and dangerous with increasingly radical utopian ideas. But the heirs of pre-Columbian indigenous cultures of America was a friend, a protector, even from the distance of the court of Charles V Hispanic or Philip II. For us today, it's critical awareness of Christianity in the clash of cultures. He left an immense work, ignored, or still very little known in our country.