I think we can divide the world in 2 and comment separately.
Historical Philosophy: I think that Plato, Hume and Descartes gave us a real advance in the methodology of thought. I think that they and some other philosophers were essential in moving mankind's cognisance forwards.
University Philosophy: Some bellends combining discussion of the history of philosophy with ethics, politics, history and language to come up with some irrelevant conjecture and claiming some authority in the process.
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