Commoner Lore where they came from?
Commoners evolved from humans, humans were unable to use magic, not as strong. Commoners evolved one difference at a time splitting off into 3 different races; alpha-humans, under-souls, and commoners. Commoners killed off the other two human types once they were able to lose their toes, restructuring their feet, remove toes, gain an additional finger, and harness magic. Non-magic commoners evolved the world forward with technology, spirituality, and anti-magic. Commoners started splitting a part, another aspect that allowed Commoners to replace humans was their ability to have children with so many different races.