CR sees the world as neatly divided into distinct societies. Each one has little or no moral disagreement, since the majority view determines what is right or wrong in that society. But the world isn't like that. [...] CR ignores the subgroup problem. We all belong to overlapping groups. [...] CR doesn't try to establish common norms between societies.

1. Cultural Relativism - Ethics: A Contemporary Introduction (2nd ed., 2011)