He became increasingly disillusioned and disturbed by the cruel and exploitative
treatment of the indigenous peoples he witnessed every day. In 1513 he took part as a chaplain in the Spanish conquest of Cuba, even being granted an encomienda for his service. However, he renounced the grant and began a long campaign to reform Spanish colonial institutions. His efforts culminated in his book A Short Account of the Destruction of the Indies, written in 1542, a withering attack on the barbarity of Spanish rule. On the encomienda he has this to say in the case of Nicaragua: