--- Theodor Herzl, The Jewish State (1946, 1988), in a section titled "Demand, Medium, Trade" (h/t Matt Nesselrodt). From Gutenberg.org:
In the earliest period of European railway construction some "practical" people were of the opinion that it was foolish to build certain lines "because there were not even sufficient passengers to fill the mail-coaches." They did not realize the truth—which now seems obvious to us—that travellers do not produce railways, but, conversely, railways produce travellers, the latent demand, of course, is taken for granted.
