A physical and philosophical mediation on why we are drawn to fight each other for sport, what happens to our bodies and brains when we do, and what it all means

Miyamoto Musashi (1584–1645) is the most famous Samurai who ever lived. His magnum opus, the Go-Rin-Sho or Book of Five Rings is a classic that is still read by tens of thousands of people each year—Japanese and foreigners alike.

Boxing is one of the oldest sports in the world, reaching back to the Ancient Greeks, although it has become popular only in the past century or so. But, in some ways, it is a rather complicated sport since – to avoid unnecessary harm – it has been endowed with rules to keep it clean, referees to see the rules are obeyed, and organizations to regulate the sport. Boxing was once largely amateur, although the professional bouts attracted the most attention, but now it is also an Olympic sport. And, over the years, there has been one champion after another who symbolized what boxing was all about, such Joe Louis, Mohammad Ali and Cassius Clay.