[citation needed] In the United Kingdom, the term single-family home is almost unknown, except through Internet exposure to US media.If people had to move to a new place or were wealthy enough, they could build or buy a home for their own family, but this was not the norm.In the New World, where land was plentiful, settlement patterns were quite different from the close-knit villages of Europe, meaning many more people lived in large farms separated from their neighbors.Owning a home with a yard and a "white picket fence" is seen as a key component of the "American dream" (which also exists with variations in other parts of the world).[4][5] In the 21st century, a lack of affordable housing, the climate change impacts of urban sprawl and car dependency, and concerns about racial inequality have increasingly led cities to abandon single-family housing and single-family zoning in favor of higher-density zones.