The second writer is Peter Thiel, the PayPal co-founder, venture capitalist and controversialist, who includes an interesting aside about the decline of cults in his new book, “Zero to One” — officially a book of advice to would-be entrepreneurs, but really a treatise on escaping what he regards as the developed world’s 40-year economic, technological and cultural malaise.

The implications of Jenkins’s argument are specific to religion. Cults can be dangerous, even murderous, but they can also be mistreated and misjudged (as Koresh’s followers were, with fatal consequences); moreover, spiritual experiments led by the charismatic and the zealous are essential to religious creativity and fruitful change. From the Franciscans to the Jesuits, groups that looked cultlike to their critics have repeatedly revitalized the Catholic Church, and a similar story can be told about the role of charismatic visionaries in the American experience. (The enduring influence of one of the 19th century’s most despised and feared religious movements, for instance, is the reason the state of Utah now leads the United States on many social indicators.)

Thiel’s argument is broader: Not only religious vitality but the entirety of human innovation, he argues, depends on the belief that there are major secrets left to be uncovered, insights that existing institutions have failed to unlock (or perhaps forgotten), better ways of living that a small group might successfully embrace.

This means that every transformative business enterprise, every radical political movement, every truly innovative project contains some cultish elements and impulses — and the decline of those impulses may be a sign that the innovative spirit itself is on the wane. When “people were more open to the idea that not all knowledge was widely known,” Thiel writes, there was more interest in groups that claimed access to some secret knowledge, or offered some revolutionary vision. But today, many fewer Americans “take unorthodox ideas seriously,” and while this has clear upsides — “fewer crazy cults” — it may also be a sign that “we have given up our sense of wonder at secrets left to be discovered.”

Thiel’s view of our overall situation is hotly contested, not surprisingly, on his own Silicon Valley turf. The Internet is cluttered with debates (some friendly, some less so) between Thiel and his peers over whether innovation has actually slowed down, whether recent technological progress is actually as disappointing as he frequently suggests.