Counterfactual Analysis

Counterfactual analysis evaluates causal claims in international relations by reasoning about what would have happened had some antecedent been different: had the archduke not been assassinated, had the United States not deployed missiles, had a leader chosen otherwise. As Fearon (1991) argues, such counterfactuals play a necessary if often implicit role in testing hypotheses about singular and small-N events, where ordinary statistical comparison is impossible. Done rigorously — with plausible antecedents, sound connecting principles, and attention to confounders — counterfactual analysis disciplines the 'what if' reasoning that pervades historical and conflict explanation.