Inazo Nitobe's book, the most influential ever written on Bushido, or the samurai Way of the Warrior, argues that the philosophy of Bushido is the true key to understanding "the soul of Japan."

Throughout history, some books have changed the world. They have transformed the way we see ourselves - and each other. They have inspired debate, dissent, war and revolution. They have enlightened, outraged, provoked and comforted. They have enriched lives--and upended them. Now Penguin brings you a new set of the acclaimed Great Ideas, a curated library of selections from the works of the great thinkers, pioneers, radicals and visionaries whose ideas shook civilization and helped make us who we are.