Bartolome de las Casas O.P. (c. 1484 - 18 July 1566) was a 16th-century Spanish historian, social reformer and Dominican friar. He became the first resident Bishop of Chiapas, and the first officially appointed "Protector of the Indians." His extensive writings, the most famous A Short Account of the Destruction of the Indies and Historia de Las Indias, chronicle the first decades of colonization of the West Indies and focus particularly on the atrocities committed by the colonizers against the Indigenous peoples. Bartolome de las Casas spent 50 years of his life actively fighting slavery and