Why is there 4 belts in boxing?

Related questions

1. What is the most prestigious boxing organization?
2. How much is WBC belt worth?
3. Is WBC diamond belt a world title?
4. Was Tyson undefeated?
5. Is Mayweather undisputed champion?
6. What's better WBO or WBC?
7. Do boxers get replica belts?
8. Why is Muhammad Ali on the WBC belt?
9. Do boxers get a new belt every fight?
10. Which is the most important belt in boxing?

Tags

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2. #charging
3. #allow
4. #union
5. #money
6. #together
7. #rarely
8. #titles
9. #difficult
10. #which
11. #holding
12. #world
13. #fringe
14. #meanwhile
15. #agree
16. #place
17. #sanction
18. #fights
19. #exceptionally
20. #considered
21. #makes
22. #boxing
23. #belts
24. #their
25. #because
26. #bodies