I went to Dartmouth intending to go to med school. Failing at chemistry class had inspired my love of history, and I ended up majoring in the classics. By the summer of 1998, my classmates were signing six-figure contracts as consultants and investment bankers. I didn’t understand what we, at age twenty-two, could possibly be consulted about. Others headed off to law school or medical school for a few more years of reading instead of living. None of it appealed to me. I wanted to go on a great adventure, to prove myself to serve my country. I wanted to do something so hard that no one could ever talk shit to me. In Athens or Sparta, my decision would have been easy. I felt as if I had been born too late. There was no longer a place in the world for a young man who wanted to wear armor and slay dragons.

Dartmouth encouraged deviation from the trampled path, but only to organizations like the Peace Corps or Teach for America. I wanted something more transformative. Something that might kill me — or leave me better, stronger, more capable. I wanted to be a warrior.