Peace educator is an ironic career choice for Paul K. Chappell, who graduated from West Point Military Academy, was deployed to Iraq, and spent seven years in active duty, leaving the Army as a captain. Chappell was, at different times, a tactical control officer for the air defense of Washington, D.C.; responsible for systems that intercepted rockets at forward-operating bases in Iraq; and a commander of a Patriot-missile battery. But throughout his service he never stopped questioning whether force was the most effective means of solving problems and achieving peace. Upon leaving the military in 2009, he committed himself to teaching nonviolence, studying under James Lawson, Bernard Lafayette, and C.T. Vivian, all of whom worked on civil-rights campaigns in the 1960s and were colleagues of Dr. Martin Luther King Jr.