50 Military Leaders That Changed the World does not celebrate warfare, but rather shines its spotlight on the leaders the author believes have had the greatest impact on world history. The 50 Military Leaders That Changed the World weren't necessarily the ?best? leaders, the most innovative strategists, craftiest tacticians, or even the bravest, smartest, or most admirable people. They were, however, the men and women who, for good or ill, entered the field of battle and left the world much changed upon their exit.