This article examines what analytical eclecticism can offer to qualify IR to overcome the Grand Theory crisis. It debates analytical eclecticism’s basic promises relying on its main characteristics which distinguish it from the dominant research traditions/paradigms: fostering research pragmatism; expanding the scope of the research issues and involving more aspects of social reality complexities in world politics; and producing complex causal statements. The article is divided into six parts. First, it provides an introduction to eclectic philosophy through Paul Feyerabend’s reflections on methodological/epistemological relativism. Second, it conceptualizes analytical eclecticism and examines its promises. Third, it explores an example of eclectic literature in the field of international studies. Fourth, it debates the relationship between the promises of eclecticism and the complexity of social causality. Finally, it seeks, in parts 5 and 6, to position analytical eclecticism epistemologically, through examining the main assumptions of Critical Relaism and its promises to move the dominant debate away from the positivist/postpositivist binary opposition.