The Classic Era, as opposed to the Imperial Era of galactic history is defined by destructive wars, discovery of new worlds, and class struggles. It ends with the creation of a unified galactic empire where all worlds are connected by the World-Councils. Future humans will look back on this time as the golden age of adventure and heroism, when the longest institutions would be founded. Living through it, most people would be glad to end the constant conflict.
Although here, the Classic Era is represented by the period between 2043-2398, it really begins with the rise of the Gid Empire c.2000 BC, coinciding with humanity's earliest civilizations.