"Writing an essay is like catching a wave," posits guest editor Ariel Levy. "To catch a wave, you need skill and nerve, not just moving water." This year's writers are certainly full of nerve, and have crafted a wide range of pieces awash in a diversity of moods, voices, and stances. Leaving an abusive marriage, parting with a younger self, losing your sanity to Fitbit, and even saying goodbye to a beloved pair of pants imbued with meaning are all...