keith_morrison has ideas about how Earth ended up running the Federation....

[conuly]

"So, fellow ambassadors, where should we designate as the capital, bearing in mind the long history and proud traditions many of our members have and taking into account--"

"The humans will screw anyone, won't they?"

"Um...well...well, yes."

"Earth. If it's not going to be my homeworld, at least make it one where the natives are up for some fun."

As Spock would surely say, the context is only logical, Captain.