Prime time was (and to a lesser degree remains) a massive ritual of collective. [fact]
With the establishment of prime time, daytime, and other new zones of attention, we see in effect another feature of the modern self emerge. Insofar as we are influenced, even formed, to some degree, by whatever we pay attention to, the novel fact of an entire population listening to the same show at the same time every day could not help but create a new degree of shared awareness, even shared identity. Prime time was (and to a lesser degree remains) a massive ritual of collective attention, a force drawing people together.
Tim Wu, The Attention Merchants, loc. 331