Xi is the sixth man to rule the People’s Republic of China, and the first who was born after the revolution, in 1949. He sits atop a pyramid of eighty-seven million members of the Communist Party, an organization larger than the population of Germany. The Party no longer reaches into every corner of Chinese life, as it did in the nineteen-seventies, but Xi nevertheless presides over an economy that, by one measure, recently surpassed the American economy in size; he holds ultimate authority over every general, judge, editor, and state-company C.E.O. ... “He’s not afraid of Heaven or Earth. And he is, as we say, round on the outside and square on the inside; he looks flexible, but inside he is very hard.” ... a quarter of the way through his ten-year term, he has emerged as the most authoritarian leader since Chairman Mao. In the name of protection and purity, he has investigated tens of thousands of his countrymen, on charges ranging from corruption to leaking state secrets and inciting the overthrow of the state. He has acquired or created ten titles for himself, including not only head of state and head of the military but also leader of the Party’s most powerful committees—on foreign policy, Taiwan, and the economy. He has installed himself as the head of new bodies overseeing the Internet, government restructuring, national security, and military reform, and he has effectively taken over the courts, the police, and the secret police. ... Xi describes his essential project as a rescue: he must save the People’s Republic and the Communist Party before they are swamped by corruption; environmental pollution; unrest in Hong Kong, Xinjiang, and other regions; and the pressures imposed by an economy that is growing more slowly than at any time since 1990 (though still at about seven per cent, the fastest pace of any major country). “The tasks our Party faces in reform, development, and stability are more onerous than ever, and the conflicts, dangers, and challenges are more numerous than ever,” Xi told the Politburo, in October.

Survivalism, the practice of preparing for a crackup of civilization, tends to evoke a certain picture: the woodsman in the tinfoil hat, the hysteric with the hoard of beans, the religious doomsayer. But in recent years survivalism has expanded to more affluent quarters, taking root in Silicon Valley and New York City, among technology executives, hedge-fund managers, and others in their economic cohort. ... In private Facebook groups, wealthy survivalists swap tips on gas masks, bunkers, and locations safe from the effects of climate change. ... impulses are not as contradictory as they seem. Technology rewards the ability to imagine wildly different futures ... How many wealthy Americans are really making preparations for a catastrophe? It’s hard to know exactly; a lot of people don’t like to talk about it. ... That night, I slept in a guest room appointed with a wet bar and handsome wood cabinets, but no video windows. It was eerily silent, and felt like sleeping in a well-furnished submarine.