Originally Posted by NCC-73515
Since Starfleet is an earth organization, it is logical that there are mostly humans in it
As far as I know, all the Fed members have their own fleets.
I disagree with this statement. I believe the individual planets within the UFP do indeed have their own ships and distinct designs, I believe Starfleet is the defacto military/exploration unit for the UFP. Since Earth was the driving force behind the creation of the UFP, it would stand to reason that an Earth organization was chosen as the primary means for defense and expansion. Of course Starfleet had to become more than an Earth organization. Starfleet includes ALL species within the UFP, but remains headquartered on Earth.