The Dutch not only used slaves in all their colonies, but also traded in slaves. The West Indies Company (WIC), set up in 1621, ran the Dutch West Indies trade, including the slave trade. Between 1621 and 1730,
WIC ships from Vlissingen carried almost 279,000 slaves from Africa to West Indian colonies and WIC ships from Amsterdam carried over 73,000. After 1730, the Dutch government let the Middelburg Commercial Company (MCC) trade slaves, as well as the WIC. Almost all MCC trade was across the Atlantic. In all, it carried just over 31,000 slaves - about 4 500 died at sea. The appalling conditions in which many traders and planters transported and kept slaves horrified many people even if they did not object to the idea of slavery itself.