A Manual for Civilization : the Long Now Foundation is assembling a book to help us survive an apocalypse, based upon James Lovelock's Book for All Seasons. Some Potential Candidates for Inclusion.
Is Neo-tribalism [rand.org, PDF, 297 KB] humanity's future? An ideology influenced by the Ishmael series by Daniel Quinn and that predicts the collapse of society and the necessity of ”walking away”, it's growing globally with neo-tribes already established. The Anthropik Tribe's goal is to ultimately form a "functional hunter-gatherer tribe in the future". Anthropik is part of The Appalachian Confederation, a /neo-tribal league/tribe of tribes/rhizome/ with it's own council, annual festival and plans for an army. Also, check out this movie about modern tribalism.
Six Visions of the End: Fall Down Six Times, an essay by Ran Prieur, describes six possible scenarios for the near future: Worst Case ("Meanwhile computer technology keeps accelerating, leading by 2050 to an insane and nearly all-powerful artificial intelligence, which exterminates all life on Earth except a single human, who it keeps alive to torture for all eternity: you."), Ridiculous Best Case ("In 2016 Dean steps down and the new president is an anarchist who spends eight years peacefully dismantling the federal government and building local systems that make central control irrelevant and impossible."), Naive Sci-Fi Utopia ("Everyone can live forever, and have kids, and enjoy wide open spaces. No one is sure how this is possible, but it probably has something to do with the Mayan calendar or the word "quantum.""), and three others. Whether or not you agree with his vision, the exercise of imagining different futures is a useful one that might help us see a way through the multiple crises the Earth is going through. What does your apocalypse look like?