  Rickert’s theory of science is primarily geared towards a philosophical elucidation of the natural and the historical sciences. This is intended to provide a defense of the sui generis scientificity of the historical sciences against the threat of positivism and naturalism. Rickert’s work on this issue builds upon Windelband’s influential paper History and Natural Science (Windelband 1980, 169–185). While Rickert criticizes some terminological and argumentative limits of his teacher’s essay, the bulk of his lengthy volume, The Limits of Concept Formation in Natural Science: An Introduction to the Historical Sciences (Rickert 1986), is consistent with the tenets of Windelband’s position.