Captain Morgan vs. Captain Smoker: Extremes on the sliding scale of corrupt marines versus good ones.
You've referred to the Marines as the only major peacekeeping force in the world. Would you explain that in more depth? To me, it seems that the central power where the commands come from works in the interest of the WG, not the people, and it is smaller authority figures like Smoker and that ratty man from Nami's island who decide whether the people under their jurisdiction are actually at peace. In that sense, aren't they similar to individual pirate crews like Whitebeard and Big Mom?