Life on Istria is governed by the unique Astronomy of Istria, and the people have formed into two main groups to adapt. The majority of the people migrate between the north and south poles on The Great Migration, but a smaller number of them live permanently around the equator.
The endless cycle of the Great Migration and the large number of migrants means that the different races of Istria are bumping up against each other.
Additionally, because most people are constantly on the move, kingdoms and empires are extremely rare and unlikely to form.
The exception is near the equator, where some have given up their nomadic lifestyles to settle down in the ever-growing cities.