User blog comment:Gametroller Prime/Four Great Powers?/@comment-34981281-20160218045430

English isn't your first language, huh? Well essentially, your question is this; "Why is the Worst Generation not a Great Power?"

Well, the first thing I'd like to point out is that Blackbeard is from the Worst Generation, and he's a Yonkou. Law is from the Worst Generation, and he's a Shichibukai. This kind of proves that 'Worst Generation' is a bit of a secondary trait. Think of it as something like our real world terms 'baby boomers' or 'millenials'. It's not an affliction, it's a status.

Another difference is that people in the Three Great Powers are appointed. The Marine HQ were promoted due to accomplishment, the Shichibukai were invited by the World Government, and Yonkou were named so due to their control of the New World. The Worst Generation seems to just be in the right place at the right time.