Earth is extremely competitive to gain any notoriety, which is really bad for a lot of people as notoriety and talent have become what is valuable in human society. People leave Earth because, while it is comfortable to live there, it is really hard to move up the social ladder. It is a lot easier to move away to get a better position, hence why humanity still colonizes other planets while Earth is paradise.
The Vulcans, Andorians, and Tellarire civilizations were going into decline when the Federation was formed. This is why Humanity became the dominant species of the Federation; the other species effectively gave up trying to be powers.
Not characters, but places.
Earth is extremely competitive to gain any notoriety, which is really bad for a lot of people as notoriety and talent have become what is valuable in human society. People leave Earth because, while it is comfortable to live there, it is really hard to move up the social ladder. It is a lot easier to move away to get a better position, hence why humanity still colonizes other planets while Earth is paradise.
The Vulcans, Andorians, and Tellarire civilizations were going into decline when the Federation was formed. This is why Humanity became the dominant species of the Federation; the other species effectively gave up trying to be powers.