Sundering
After the First War of the Realms The Elf of the Deep was cast out of Aliphia and fell to Aboden. He struck the Western continent and shattered it. He inadvertently triggered a "Shuffle" which scattered the races.
First Demon Invasion
The result of the First Demonic Invasion was 2 fold. first, the defenses, Angelic and Guardian, were greatly weakened. Second, the Draekins efforts to keep the races segregated failed, and many of the races intermingled.
Second Demon Invasion
The alliances made by The Emperor were made permanent, either through diplomacy or force, and the Empire was officially formed. A kingdom in wihich many races, though still mostly humans, lived. Even outside the Empire, the races were intermingling more than ever before.