I was readin the article about cruiserweight division on the site today, and it was talkin about how 17 divisions isn't too many divisions but 51 champs or so is too many for 17 divisions, and I agree. It got me thinkin though because I've been confused about this for a long time,how is it all descided? I mean you have WBA WBO IBF WBC champs but how do you have just one world champ? Do you have to win all those belts in your division or what?

When you have a guy winning all the major belts he in the undisputed champ of the world. When you have guys in the same weight class with different belts they r all champs but of the belt they r holding.