People, especially we denizens of western civilization, are often linear critters. Things had a beginning and will have an end. Life is a journey from birth to death to whatever comes after that (I don’t pretend to know). We mark off lives in time relative to predictable expectations and norms and “acting our age.” I am entering what is called “middle age,” bringing with it the expectation that my life is halfway between its beginning and its end, as well as expectations about what I should or shouldn’t do. This linear story often has “high points” and “low points,” an expectation of “glory days” and “good times” (usually in the younger years) and a long, steady decline full of anxiety, nostalgia, and reaction beginning around 40. Is this why middle-aged people so often start thinking the world is coming to an end?