By then Berlin was getting its own back from the Allies. But for years it had been under a different kind of bombardment, one entirely invisible from the ground or the air, and even more relentless. The assault was perpetrated by a demagogue whose mesmerizing oratory had been propagated in measures beyond any the world had seen, capturing more human attention than NBC or CBS could dream of, and indeed holding it captive. And so did this demagogue seize his own nation before his mad attempt to seize all the rest.

Tim Wu, The Attention Merchants, loc. 373