8. Declaration on Principles of International Law Concerning Friendly Relations and Cooperation Among States in Accordance with the Charter of the United a Nations, G.A. Res. 2625, 35th Sess. (1970); Declaration of the Inadmissibility of Intervention into the Domestic Affairs of States, G.A. Res. 2131, 30th Sess. (1965). See also Brilmayer, supra note 7, at 6 (discussing contractarian theories of state sovereignty and legitimacy).