
The cultural basis of relationships in selected, primarily non-western cultures. Less than 15% of them require monogamy, and polygyny is generally practiced by men who can afford it in the rest
Source: chart by editor, source material at http://eclectic.ss.uci.edu/~drwhite/courses/SCCCodes.htm

Map of the United States-State Laws About Same-Sex Unions
Source: Open Source-wikipedia.org. Edited by managing editor to reflect changes to 2008.