From a Jack Shafer Fourth Estate column on politico.com headlined “A Newspaper Strike Ain’t What It Used to Be”:

As recently as the 1960s, newspaper unions were powerful enough to drive newspapers under with prolonged strikes, as happened in New York City in 1963 when four of the city’s seven dailies folded after a 114-day strike. But the technological and economic conditions that allowed newspaper unions to accrue such influence have been swept out with history’s tide, rendering them more of a nuisance than a genuine threat to publishers.