The life of Karol Wojtyla would be remarkable even if he never became the Millennium Pope, revered by millions worldwide. From a Polish schoolboy who loved outdoor pursuits and quietly coped with family tragedy, he matured into a talented linguist, actor, and author, and experienced Nazi occupation, the Iron Curtain, and Solidarity's overthrow of Communism. His rise through the ranks of the Catholic Church was accelerated upon recognition of his gifted mind, combined with his behind-the-scenes activism and rapport with parishioners, especially youths.

The reign of John Paul II has...