I made 2 theories on the different parts of the OP world and the possibility of Kinemon, Kanjuro, and Raizo using magic opposed to DF abilities, but I changed my mind to make them into a 1 because it would be more fun.
Goda has blessed us with many facets of the OP world. There is the
- Pirate side
- WG (they make use of every other side - science, pirates, etc) has Marines, Gs, CPs, Royals, CD, science division, Warlord system and others
- many more to come
I want to suggest some for the One Piece World with evidence that was hinted. Are there more than showed already? I think that there is.
1. Sporting world - wrestling, boxing, sumo wrestling, kick boxing, possibly soccer, baseball, racing, and martial arts.
2. Magic world - possibly that is the basis for Mink's electro, Luffy having Ace's fire, abilities of Momo's retainers, McGuy's sword.
3. Creatures and humans relations - Boa uses her snake in battle, Mohji and Richie, 1 of Shanks mates and Doma work with monkeys, and Ussop uses the plant life and possibly bugs.
4. Bounty hunters, mercenaries, and assassins business
5. My favorite, the possibility of a Demon aspect to OP - Oars Sr and Jr, some of these characters with horns or bagged eyes intrigue me.