Abstract
Reference to past possibilities is not an additional luxury in writing history, after all facts have been established. For even facts become such only within a field of alternative options. What it means that one path was taken depends in part on answers to the question which other paths once open were not taken. Historical potential unrealized can be conceived of in a number of ways: as unfulfilled intentions, as unresolved problems, as suppressed endeavours, as waived alternatives within a context of decision, or as losses incurred by gains in some other respect. Some of these conceptions are non-exclusive. None of them provides the single model to grasp past possibilities; rather, they will turn out to be more or less elucidative according to historical case.