Human Sciences at Quaritch embraces a wide range of books and manuscripts documenting the history of ideas from the earliest times up to about 1960. Our strengths are in the history of economic thought and in philosophy, but we also deal in law; finance and banking (including speculation, actuarial science and insurance); politics and political theory; sociology; psychology; agriculture; education; logic; and the theory of language.

Some notable items which have recently passed through our hands include the only known copy of the Communist Manifesto inscribed by Karl Marx, Rudolf Carnap’s annotated copy of Wittgenstein’s Tractatus (Logisch-philosophische Abhandlung), Joseph Penso de la Vega’s Confusion de Confusiones (1688, the first book to describe the practice of a stock-exchange) and a copy of Adam Smith’s Wealth of Nations (4th edition, 1786), inscribed in Smith's own hand to Bonnie Prince Charlie's private secretary.

As well as dealing in individual books and manuscripts, we also offer collections. In recent years we have sold author collections of Friedrich Nietzsche, Bertrand Russell, Thorstein Veblen, Emile Durkheim and Jeremy Bentham. Among subject collections we have offered are the Herwood Library of accounting literature (including Pacioli's Summa de Arithmetica, 1494, the first printed exposition of double-entry book-keeping); the philosophy of language; texts pertaining to the theory and study of language in the West, and the history of probability - the calculus of probabilities, statistics and their applications.