" From my reading of history, the thing you have to have to use knowledge is leisure. Where everybody has to work hard just to get a living and there is leisure to think, knowledge stagnates, and people with it. The thinking has to be done largely by people who are not directly productive—by people who appear to be living almost entirely on the work of others, but are, in fact, a long-term investment. Learning grew up in the cities, and in great institutions—it was the labor of the countryside that supported them. "

― , The Day of the Triffids