Mosse's first published work was a 1947 paper in the "Economic History Review" describing the Anti-Corn Law League. He claimed that this was the first time the landed gentry had tried to organize a mass movement in order to counter their opponents. In "The Holy Pretence" (1957), he suggested that a thin line divides truth and falsehood in Puritan casuistry. Mosse declared that he approached history not as narrative, but as a series of questions and possible answers. The narrative provides the framework within which the problem of interest can be addressed. A constant theme in his work is the fate of liberalism. Critics pointed out that he had made Lord Chief Justice Sir Edward Coke, the chief character of his book "The Struggle for Sovereignty in England" (1950), into a liberal long before liberalism had come into existence. Reviewers noted that the sub-text in his "The Culture of Western Europe" (1961) was the triumph of totalitarianism over liberalism.