What is the main argument in the book The Sea-Wolf by Jack London?

Do your own homework.

never take a job working for guys named WOLF. Drown first.
That sorta summarizes it as short as anyone can do.

I love Jack London's work since high school. Then I was always the first to read all the literature for the summer and loved to write essays. The mind is the same weapon, the same tool that can be used both for good purposes and for destructive purposes. Being smart and well-read doesn't mean being a good person. Wolf Larsin is a confirmation of this: haughty, immoral, rude, inhuman, he reads a lot and learns a lot, but follows the principle "The strongest survives", the highest value is his own life, and the lives of other people do not matter to him. He does not hesitate to take the life of his own sailors, because the presence of the same arms, legs and body, like his own, is not a reason for him not to kill.
The main character, on whose behalf the narration goes, goes the way of becoming from a white-handed guy to a man tested by tests, who, moreover, meets the love of his life.

Do you think it is smart to reach out on a random board and ask someone to do your homework? A lesson - you are likely to get good results - either someone is going to tell you to do your own homework or else someone is going to give you an incorrect answer.

Ask for help - or assistance on how to tackle a question or subject but do not expect anyone to give you a good answer.

I suppose, after more than five years, the OP will hopefully have finished his homework

Ha ha did not see that!

Well too late - hopefully he successfully graduated high school