Noun
the body of laws governing relations between nations
Source: WordNetOn his part, Emmerich de Vattel argued instead for the equality of states as articulated by 18th century natural law and suggested that the law of nations was composed of custom and law on the one hand, and natural law on the other. Source: Internet
To characterize any conduct whatever towards a barbarous people as a violation of the law of nations, only shows that he who so speaks has never considered the subject." Source: Internet
Treason is generally making war against one's own countrymen, and violations of the law of nations can include unjust war among other nationals or by governments against their own people. Source: Internet