Syrian-Saudi relations have been a paradox in inter-Arab politics during the oil era. Commentators and analysts have questioned why the two states pursued mutually conflicting aims in almost every major regional or international foreign policy issue and often propagated contrasting ideological banners over the past thirty years; while both acting as though some form of an alignment existed between them? Here, Sonoko Sunayama explores the logic behind the paradoxical longevity of this cooperative relationship and argues that what ultimately makes Saudis and Syrians so indispensable to each other is the perception and the historical appeal of 'shared identities', be they Arabism or Islam.