One could dismiss this proliferation of “The End” as a plea for attention by publishers, magazine editors, authors, bloggers, TED talkers and the rest of the ideas industry — a marketing device signaling little more than the end of imagination. But it is more than that. “The end of” is also the perfect headline for our age. It fits a moment that fetishizes disruption over stability. It grabs an audience enamored of what is next, not what is here. It suits a public debate in which extreme positions are requisite starting points.