career as a professional historian and finish your PhD at thirty-two. The bad news is that in your fifties, you are still pretty wet behind the ears. But here’s the good news: at age seventy-two, you still have half your work to go! Better take care of your health so you can write your best books into your eighties. If you take these facts as being random, you get very little actionable strategy for life, beyond perhaps becoming a competitive Scrabble player