Different societies apply different criteria regarding who is classified "black", and these social constructs have changed over time. In a number of countries, societal variables affect classification as much as skin color, and the social criteria for "blackness" vary. In the United Kingdom, "black" was historically equivalent with "person of color", a general term for non-European peoples. In other regions such as Australasia, settlers applied the term "black" or it was used by local populations with different histories and ancestral backgrounds.