I was just thinking about this yesterday and it left me wondering.
1. How do Galka's increase there numbers? Galkas reproduce through some sort of reincarnation. No one knows exactly how it works, but when a galka dies of old age he is born new.
So what about when they die in battle or die from disease? Surely over time one day they would all die out.
2. Do all Galka really come from Kuzotz? For a whole race its really not that big. Mithra have some place in the south that i would assume is bigger and the Elvaan are said to have an empire in the west (the far west i guess as Adoulin is no Elvaan empire).