Christopher Columbus
Since the late 20th century, historians have criticized Columbus for initiating colonization and for abuse of natives. Among reasons for this criticism is the poor treatment of the native Taíno people of Hispaniola, whose population declined rapidly after contact with the Spanish. Columbus required the natives to pay tribute in gold and cotton. Modern estimates for the pre-Columbian population of Hispaniola are around 250,000–300,000. According to the historian Gonzalo Fernandez de Oviedo y Valdes, by 1548, 56 years after Columbus landed, and 42 years after he died, fewer than 500 Taíno were living on the island. The indigenous population declined rapidly, due primarily to the first pandemic of European endemic diseases, which struck Hispaniola after 1519. The natives had no acquired immunity to these new diseases and suffered high fatalities. There is also documentation that they were overworked.
Hispaniola
Under Nicolás de Ovando y Cáceres' governorship, the Indians were made to work in the gold mines. By 1503, the Spanish Crown legalized the distribution of Indians to work the mines as part of the encomienda system. Once the Indians entered the mines, they were often wiped out by hunger and difficult conditions. By 1508, the Taíno population of about 400,000 was reduced to 60,000, and by 1514, only 26,334 remained. About half resided in the mining towns of Concepcion, Santiago, Santo Domingo, and Buenaventura. The repartimiento of 1514 accelerated emigration of the Spanish colonists, coupled with the exhaustion of the mines. The first documented outbreak of smallpox, previously an Eastern hemisphere disease, occurred on Hispaniola in December 1518 among enslaved African miners. Some scholars speculate that European diseases arrived before this date, but there is no compelling evidence for an outbreak. The natives had no immunity to European diseases, including smallpox. By May 1519, as many as one-third of the remaining Taínos had died.