Not until the beginning of the 20th century did Europe's urban populations finally become self-sustaining: before then, constant immigration of healthy peasants from the countryside was necessary to make up for the constant deaths of city dwellers from crowd diseases. Guns, Germs And Steel
“Will he not fancy that the shadows which he formerly saw are truer than the objects which are now shown to him?” Republic
The strange thing about life is that though the nature of it must have been apparent to every one for hundreds of years, no one has left any adequate account of it. Jacob's Room
[Neurotics are] torn by inner conflicts ... Every neurotic ... is at war with himself. Self-Analysis
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