The Ottoman conquest shrinks the slave trade of the Venetian Empire.
Date: 1400s
This drives up the "price" of enslaved people. The trade largely shifts from buying people as workers to buying "beautiful" young people as luxuries. The conquest also cuts off the pre-established sugar trade, forcing markets to look for other places to establish their plantations. Painter writes about this as the beginning of the fragile, porcelain-skinned beauty trope that is central to the later North American institution of slavery.