Those impulses are not as contradictory as they seem. Technology rewards the ability to imagine wildly different futures, Roy Bahat, the head of Bloomberg Beta, a San Francisco-based venture-capital firm, told me. “When you do that, it’s pretty common that you take things ad infinitum, and that leads you to utopias and dystopias,” he said. It can inspire radical optimism—such as the cryonics movement, which calls for freezing bodies at death in the hope that science will one day revive them—or bleak scenarios. Tim Chang, the venture capitalist who keeps his bags packed, told me, “My current state of mind is oscillating between optimism and sheer terror.”
If you have a proper survival knife with you when the weather closes in you can make an emergency shelter; if there’s the material available to do so. But it’s better just to make sure that whenever you venture into the woods for any length of time that you have the right survival gear with you and the Sundome 2 Person backpacking tent from Coleman is that survival gear.

There are other ways to absorb the anxieties of our time. “If I had a billion dollars, I wouldn’t buy a bunker,” Elli Kaplan, the C.E.O. of the digital health startup Neurotrack, told me. “I would reinvest in civil society and civil innovation. My view is you figure out even smarter ways to make sure that something terrible doesn’t happen.” Kaplan, who worked in the White House under Bill Clinton, was appalled by Trump’s victory, but said that it galvanized her in a different way: “Even in my deepest fear, I say, ‘Our union is stronger than this.’ ”
Religion, however, has everything to do with survivalism—there are things about your faith that affect the way you live, Fletch says, offering me an example. “Today, a great deal [on the menu] was the special you had,” he says. “Every one of the specials had pork in it. Well, depending on your belief system and where you’re coming from, Dan, you could’ve made several decisions about me.” He’s right; I could’ve thought he assumed the breakfast was on me, so he ordered the most expensive dish on the menu. And those assumptions, he says, can break up a group. “If 99 percent of the people in your group don’t eat pork, and you bring in some person eating a ham sandwich next to you, that’s going to cause some conflict.” 

What’s on the list depends on which faction of preparedness you practice, pre-Y2K prepper and Seventh-day Adventist Church pastor Craig Wiles tells me. There are preppers, who anticipate an event like an ice storm or an EMP; there are survivalists, who arm themselves to face an enemy like a tyrannical government; and there are homesteaders, who grow their own food and practice self-sufficiency. 
We get that creature comforts will be ever more important as the things that used to make us happy slowly break and crumble around us. But do you really want to put a ton of effort into opening a bakery when everything is going to shit? And we hate to be the bearers of bad news, but no amount of odor elimination is going to stop the uncivilized world from smelling really, really bad.

“One misconception about prepping is that you’re always thinking there’s going to be some kind of epic disaster,” she told me over the phone from Virginia. “The most common disaster that we prep for, or that happens to us, is a financial problem.” A longtime single mother, Luther said her interest in food storage grew out of a period of “abject poverty” following the 2008 recession. Lisa Bedford, a Texas-based writer who runs the site The Survival Mom, told me she got into disaster preparedness around the same time, when she wasn’t sure if her husband’s construction business would survive the downturn. (Bedford also works as an independent consultant for Thrive Life, meaning that she promotes their products online, and receives a commission on purchases from customers she refers to the company, as well as a discount on products she buys herself.)
Don’t forget spices and nutritional supplements. Yes, you can plan a well-balanced diet with prepared foods, but not everyone has the same taste. Spices and herbs allow you to change up the flavor of the same basic ingredients for variety and interest. Vitamins and supplements are an important addition to your emergency supply stash. Choose nutrition bars, protein powder, or multivitamin capsules that support nutrition and boost natural immunity.
3. The water will slowly filter through the charcoal and drip out of the cap. Put a bandanna or another cloth over the hole to filter out any bits of charcoal. (If you’re experiencing intestinal distress—and you very well might be, since your body goes into different kinds of shock in these situations—eat a little bit of the charcoal. It’ll help bind you back up.)