Urizen history
Centuries ago, humans ascended the mountains of Morrow to move away from the orcs that were dominating the fertile plains. When they reached the peaks, they found ruins that were clearly not of human origin. They discovered no remnants of the original inhabitants, nor any suggestion that they had been destroyed in a catastrophe. There were simply great, empty halls carved into several of the most magically attractive peaks.
These echoing galleries formed the heart of the first half-dozen Urizen spires, and remain an enduring mystery that is still debated by scholars. The people who made these galleries were probably humanoid, albeit slightly larger than humans, and spent a lot of time studying the night sky. These forerunners had an advanced grasp of the lore of the Realms of Day and Night, but no apparent concept of the other four Realms.
Initially the main appeal of their mountainous home was their defensibility. As they explored further they encountered many places with a strong natural aura of magical power. The mountains were also rich in mineral wealth that helped their crafters create numerous wonders. They used their magic to ameliorate the problems of creating dwellings and producing food on the inhospitable mountains. As the decades passed, the people developed into the Urizen.
The arrival of humans from across the sea was welcomed by the Urizen. They initiated diplomacy with the Highborn and the Dawnish, and became maintained cordial relations with Highguard thereafter. .
Joining the Empire
While the First Empress had the support of a handful of Urizen, the nation as a whole declined to join her nascent Empire. The First Empress was a powerful warrior and an inspirational general, but the Urizen mages predicted disaster if their nation joined an Empire led by a conqueror. After the death of the Empress, her successor opened negotiations with the Urizen who were impressed by his commitment to a rational, ordered society. They agreed to join, and helped to create the Conclave as a body of representation for every magician, a body that could share magical learning and ensure that it was used to the benefit of the Empire rather than its detriment.
Urizen benefited strongly from joining the Empire. Food imported from the Marches allowed the spires to grow and freed people to devote more time to training and study allowing Urizen to develop into the nation of magicians and scholars it is today. The Empire gained more than just their magical lore and skills; shrewd interventions by the first Urizen senators transformed the tests of citizenship adding literacy, numeracy and theology to the requirements needed to pass. In the decades that followed, their adroit manipulation of the role of the civil service was instrumental in raising standards of education right across the Empire.