A town, such as London, where a man may wander for hours together without reaching the beginning of the end, without meeting the slightest hint which could lead to the inference that there is open country within reach, is a strange thing. This colossal centralisation, this heaping together of two and a half millions of human beings at one point, has multiplied the power of this two and a half millions a hundredfold; has raised London to the commercial capital of the world . . .

Frederick Engels (1820-1895), Condition of the Working Class in England, 1845