3 Great Powers

Not much is known about the Three Great Powers (三大勢力, San Dai Seiryoku) except for the fact that they seem to be a very vital part of the World Government. There seems to be some sort of balance between the Three Powers. The Gorousei fear that if this balance gets disrupted, the world itself could fall apart. This has not yet been explained so far as to why one of the Three Powers being weakened could pose such a dangerous threat. One possible reason may be that the World Government or the Gorousei themselves play these various powers against one another to ensure that no single insitution becomes too powerful.

The Three Powers are the Marines, the Shichibukai, and the Yonkou.