Endowed by nature with a lot of energy if not excessive, Jack London created several characters in his image. Among them, Martin Eden and here Larsen, the captain of the Sea Wolf. The question in this novel is "What is the force without morality?". Larsen is strong, without culture and takes what he is capable of. Upon contact, the other heroes, peaceful, adapt to a world where the law of the strongest prevails. Parable on the reports of force and morality, the wolf of the seas is a fundamental and Manichean novel that is reminiscent, in more simplistic, the Devil and the Good God Sartre.