By 1570, most residents of Cuba comprised a mixture of Spanish, African, and Taíno heritages. Cuba developed slowly and, unlike the plantation islands of the Caribbean, had a diversified agriculture. Most importantly, the colony developed as an urbanized society that primarily supported the Spanish colonial empire. By the mid-18th century, there were 50,000 slaves on the island, compared to 60,000 in Barbados and 300,000 in Virginia; as well as 450,000 in Saint-Domingue, all of which had large-scale sugarcane plantations.