User blog comment:Staw-Hat Luffy/Why Kaido?/@comment-5387880-20130204125342/@comment-4605926-20130205141536

I think my comment below fits here exactly as well. While one could argue about the term "creature", I believe this is enough to conclude that he is the most powerful being in the world as Whitebeard died in the war. A crew's strength is not measured solely on its captain's combat abilities but on each and every crew member's strength and their combined power. Therefore, while Kaido is presumably stronger than Big Mom, according to the statement in the manga that "Kaido the Beast" is said to be the strongest creature alive, this does not say anything about each of the Yonkos' respective crews as a whole.