Morihei Ueshiba was the founder of Aikido. His life was the thing that heroes and adventurers are made of. Enlisted in the Army during the Russo-Japanese War, studied Daito-Ryu under Sokaku Takeda (described as an "unparalleled swordsman in his time, and "possessing a level of skilled that was almost divine" ), joined Onisiburo Deguchi, the Guru of Omoto-Kyo and becoming a loyal disciple, engaged in the ill-fated Mongolian Incident, survived the destruction that came with WWII, and discovered the revelation that through peace, not war, was the true Way of the Warrior.
Throughout his entire adult life, O'sensei (Great Teacher) as he is often refer to as, cultivated, nurtured, refined, and disseminated the waza, ki and spiritual foundation of the martial art we know of today as Aikido.
He died as he lived, teaching Aikido shortly before he passed away from liver cancer, at the age of 85.