People everywhere are discovering that their own views about a decent society are widely shared around the world. The Universal Declaration of Human Rights already made this clear in 1948 by referring to “a common understanding” of rights and freedoms and a “recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family.” A challenge for social scientists is to develop dimensions for an index that measures variation in the extent to which societies are decent. Such an index would be useful in research for comparative and analytical purposes, and it could also be useful to people who mobilize to made demands of their government for a better society.