Counterfactual reasoning and method in historical geography

This paper connects philosophical debate concerning the metaphysics and epistemology of counterfactuals to the methodological concerns of historical geography. It argues that counterfactual claims are implied by a wide range of common epistemic judgements, specifically those regarding evidential support and explanatory connection. In addition it argues against those who have sought to restrict the use of counterfactuals to, in particular, rational action, or systems that are inherently chancy. Rather it argues in favour of an expanded role for counterfactual method in history and geography, in the forms of imaginary experiments and the questioning of ‘what might have been’.