German philosophy
Neo-Kantianism refers broadly to the revival of the type of philosophy explained by Immanuel Kant and of the interpretations of Kant provided by post-Kantian philosophers such as Schopenhauer, Jakob Friedrich Fries and Johann Friedrich Herbart. Major figures in the neo-Kantian movement, which began around the 1860s, include Friedrich Albert Lange and Hermann Cohen.
Ethnocentrism
Scholars are generally agreed that Boas developed his ideas under the influence of the German philosopher Immanuel Kant. Legend has it that, on a field trip to the Baffin Islands in 1883, Boas would pass the frigid nights reading Kant's "Critique of Pure Reason". In that work, Kant argued that human understanding could not be described according to the laws that applied to the operations of nature, and that its operations were therefore free, not determined, and that ideas regulated human action, sometimes independent of material interests. Following Kant, Boas pointed out, for instance, the starving Eskimos who, because of their religious beliefs, would not hunt seals to feed themselves, thus showing that no pragmatic or material calculus determined their values.