The German sociologist Gerd-Günter Voss has outlined the development, over many centuries, of three forms of the “conduct of life.” The first is the traditional: in this model your life takes the form that the lives of people in your culture and class have always taken, at least for as long as anyone remembers. The key values in the traditional conduct of life are “security and regularity.” The second model is the strategic: people who follow this model have clear goals in mind (first, to get into an elite university; later, to become a radiologist or own their own company or retire at fifty) and form a detailed strategic plan to achieve those goals. But, Voss suggests, those two, while still present in various parts of the world, are increasingly being displaced by a third model for the conduct of life: the situational.

The situational model has arisen in recent social orders that are unprecedentedly dynamic and fluid. People are less likely to plan to be radiologists when they hear that radiologists may be replaced by computers. They are less likely to plan to own a company when whatever business they’re inclined toward may not exist in a decade, or may undergo some kind of transformation we can’t currently anticipate. They are less likely to plan to have children when they don’t know what kind of world (in terms of climate as well as society and technology) they will be raising those children in. They might not even want to plan to have dinner with a friend a week from Friday, because who knows what better options might turn up between now and then?

Though the situational conduct of life is clearly distinct from the strategic model, it’s a kind of strategy all the same: a way of coping with social acceleration. But it’s also, or threatens to be, a kind of abandonment of serious reflection on what makes life good. It’s a principled refusal to ask, with Horace, “Where is it virtue comes from, is it from books?” or “What is the way to become a friend to yourself?” You end up just managing the moment. Therefore you certainly won’t ask whether your life will be driven by “hope and fear about trivial things, / In anxious alternation in your mind”—because what else could possibly drive it?.

— Alan Jacobs, Breaking bread with the dead: a reader’s guide to a more tranquil mind