This lecture discusses key ideas from the ancient Stoic philosopher Seneca's Letters, this one looking at Letter 90

It focuses specifically on Seneca's engagement with another earlier Stoic philosopher, Posidonius, who developed theories about the development of human disciplines and technology (artes), having to do with wisdom and philosophy. Posidonius postulates a golden age in which human beings lived in accordance with nature and were ruled over by the wise, and then a degeneration through greed, self-indulgence, and other vices into a lesser state in which they needed more and more technologies. Seneca argues that these were developed using human reason, but not right reason, from ingenuity rather than wisdom, and that while philosophers might have developed some of them, they did not do so as philosophers. In this letter, Seneca also outlines what the matters that wisdom and philosophy deal with are.

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