Morihei Ueshiba (1883-1969) was history's greatest martial artist. Even as an old man of eighty, he could disarm any foe, down any number of attackers, and pin an opponent with a single finger. Although invincible as a warrior, he was above all a man of peace who detested fighting, war, and any kind of violence. His way was Aikido, which can be translated as "The Art of Peace." Morihei Ueshiba is referred to by the practitioners of Aikido as O Sensei, "The Great Teacher".