FrenemiesIn Frenemies Mark L. Haas addresses policy guiding puzzles such as: Why do international ideological enemies sometimes overcome their differences and ally against shared threats? Why, just as often, do such alliances fail? Alliances among ideological enemies confronting a common foe, or "frenemy" alliances, are unlike coalitions among ideologically similar states facing comparable threats. Members of frenemy alliances are perpetually torn by two