Ok, so I see a number of posts on this badge, but I can't get to the bottom of it.
As far as I understand it:
- The top 40 tags on a site need to have more than 200 questions each.
- Users need to gain at least 15 up-votes in 20 of those top 40 tags
According to this query (and others I found very similar), I almost qualify for the badge (my user number is 10945) and I have just a few more votes in the "humans" tag to go.
I'm currently a middle-ranking user on WorldBuilding, so it's reasonable to assume that many other users have qualified in terms of the two points above.
For reference, here is the list of tags on WB.
I also read Jeff Atwood's announcement of this badge on his blog
One thing the badge doesn't say, is that there must be at least 200 questions in all 40 of the top tags before this badge is awarded to anyone. That's why you won't see it on meta for a bit longer, or any new sites for about a year. I don't feel you can accurately measure a generalist until the top tag list settles down
So, there's something simple here that I'm obviously missing and not been able to work out from the numerous other questions on this subject.
I agree that "If you don't understand it, you don't deserve it." is most probably a valid response here.