Often ethnic diversity is a product of earlier waves of gentrification. Many of the first people to buy Brooklyn rooming houses and turn them back into one or two family homes were West Indian immigrants. And, as Osman explains, it was the college-educated sons of Irish Park Slope and Italian Carroll Gardens who eschewed moving to the suburbs with their cohort in the early 1960s. Instead they organized local businesses, homeowners, and newcomers to renovate, beautify, and promote their neighborhoods. But it is exactly these elderly minorities and white ethnics who are replaced by each yuppie couple.