The series Enterprise seems to say that Earth was the driving force that brought the original members of the Federation together. Without Earth, the other founders would have just gone their own way.
Debatable, the Romulan War wouldn't have happen, the Romulans wouldn't have later been penned up behind the NZ in the 23rd and 24th centuries.
The Egyptian Empire lasted just over 3000 years.
The Mayan civilization (semi-empire) was about 2900 years.
The Chinese empire was over 1300 years (depends on what you consider a "empire")
The Byzantines were a even 1000 years.