Cultures

Cultures are extremely broad in GURPS, and usually encompass multiple
nationalities (or planets, in futuristic settings). Populations and locations that
share cultures change with time. For instance, “American” and “Italian” are
distinct nationalities, but both are part of the “Western” culture – at least in the
modern world. In 200 A.D., the “Anasazi” and “Roman” cultures would be quite
distinct.