Tessar besides Earth is a planet plagued by its many internal conflicts that mark the change of eras on its dry restless surface.

Divisive Era – the time after the Exodus ended, the first inner conflict was resolved by imprisoning of Ghettanins, without interstellar travel, Tessarans ruled with austere determination

Golden Era – the time of a functional planetary state, rule of the law and ability to travel off the planet, marked with a long period without inner conflicts

Imperial Era – the time of the Imperium, rule of authority, inability to leave the planet, marked with a series of bloody uprisings that were put out by the authority

Virtuous Era – Imperium continues but with less harsh authority trying to return the rule of law, some argue that the change was just a cosmetic one and that Historians secretly kept their rule over Tessar