Taylor Swift is largely unmatched in modern pop — an artist who combines the soul of a poet, the nous of a chess master, and a hedge-funder’s eye for arbitrage opportunities. And her 11th studio album, The Tortured Poets Department, caps off a period of cultural dominance unseen in recent history. For an industry that runs on youth and novelty, Swift’s hitting a career peak in her mid-30s is a rare feat, and it’s even more remarkable for a woman, especially one who...