Common law traditions have shaped key international human rights doctrines, such as habeas corpus, due process, and judicial independence. These principles have been embedded in international treaties and conventions like the ICCPR and the European Convention on Human Rights.

It depends on the country. Some countries (like Canada, parts of the U.S., and the UK) may recognize common-law relationships (where a couple lives together without a formal marriage). However, many countries do not recognize them legally, which can affect rights like inheritance, immigration, or spousal benefits abroad.