Sentence:  Americans remain enamored with Europe's ability to produce the consequential thought for America. It was the same in nearly every <WSD>liberal</WSD> field. Education sought its roots in such Europeans as Froebel, Frobenius, and Rousseau. Political science tried to connect to Thomas Hobbes, John Locke, Nietzsche, Machiavelli, and Otto von Bismarck, for instance. Economics copied the thought of Adam Smith, ... 
Meaning of the word marked with <WSD> tags:  Pertaining to those arts and sciences the study of which is considered to provide general knowledge, as opposed to (vocational)/(occupational), (technical) or (mechanical) training.