This paper analyses the methodological writings of the nineteenth century historian Johann Gustav Droysen. It explores how Droysen integrates the political and methodological aspects of historiography. The paper shows that Droysen relies on a procedure of “affirmative genealogy” which, in turn, is based on a concept of historical continuity. On Droysen’s account, historical continuity enables “historical understanding”. And the understanding of historical continuities provides the statesman – the “practical historian” – with a solid basis for political decision making.