The introduction of sugar cane from Dutch Brazil in 1640 completely transformed society and the economy. Barbados eventually had one of the world's biggest sugar industries. One group instrumental in ensuring the early success of the industry were the Sephardic Jews, who had originally been expelled from the Iberian peninsula, to end up in Dutch Brazil. As the effects of the new crop increased, so did the shift in the ethnic composition of Barbados and surrounding islands. The workable sugar plantation required a large investment and a great deal of heavy labour. At first, Dutch traders supplied the equipment, financing, and African slaves, in addition to transporting most of the sugar to Europe. In 1644, the population of Barbados was estimated at 30,000, of which about 800 were of African descent, with the remainder mainly of English descent. These English smallholders were eventually bought out and the island filled up with large African slave-worked sugar plantations. By 1660, there was near parity with 27,000 blacks and 26,000 whites. By 1666, at least 12,000 white smallholders had been bought out, died, or left the island. Many of the remaining whites were increasingly poor. By 1680, there were 17 slaves for every indentured servant. By 1700, there were 15,000 whites and 50,000 enslaved blacks.