Skills in Real Estate: Please Sir, may I have some more?

Aristotle, who lived, 384-322 BC, is said to be the last person who knew everything there was that was known. And even he knew nothing, of course, about the areas of the world that he did not know even existed. Prior to the printing press (starting in 1436) enabling widespread dissemination of the written word, it was possible to get close to reading everything that had been written, that existed within the geography you inhabited. Leonardo (1452-1519) famously travelled around with his own library and was of course a noted polymath. When there wasn’t that much to know about any subject, knowing a fair amount about everything was feasible.