Wilhelm von Humboldt
• Wrote The variety of human language structure, which was later hailed by Leonard Bloomfield as 'the first great book on general linguistics.' The book promotes the idea that language is the product of the creativity of the human mind, and so language shouldn't be evaluated according to antiquated ideas about grammatical structure. "One may also see how Kantian theory was itself influential in Humboldt's thinking. Kant's theory of perception involved sensations produced by the external world being ordered by categories or 'intuitions' (Anschauungen) imposed by the mind, notably those of space, time, and causality. This was a universal philosophical theory; Humboldt adapted it relativistically and linguistically by making the innere Sprachform of each language responsible for the ordering and categorizing of the data of experience, so that speakers of different languages live partly in different worlds and have different systems of thinking. One notes the use by Humboldt of the three verbal nouns Anschauen, Denken, and Fühlen (perception, thinking, and feeling) in connection with the operation of language" (Robins 1997:166).