I wonder after I watched this series it change me alot because I have seen the brilliant idea of the leather or as the king Ragnar he is such a intelligent person who never give up his life for the sake of loyalty, his smartness that conquered the great britain, though he is a murderer and a raider person but he sacrifice alot. What I had leraned from this series is that to be a successful person we need to use our brain for each and every step of our life. Be a winner no matter what live lead you. I recommend to you please check this serious out.