From the publisher’s description:
In The Liberal Ideal and the Demons of Empire, noted historian Bernard Semmel traces the evolution of the ideas about imperialism and discusses four major schools of thought: the classical economists, the social theorists, the national economists, and the Marxists.
Semmel, Bernard (NHC Fellow, 1986–87). The Liberal Ideal and the Demons of Empire: Theories of Imperialism from Adam Smith to Lenin. Baltimore: Johns Hopkins University Press, 1993. ISBN 9780801845406.