Alex had this keen observation that most people are workers, and workers are just workers for life.
People are born workers, and such status is simply inherited from their parents.
A few percentage of the population are well-born, and such status is also inherited.
In this case, in our world, the simple dichotomy is obvious. The workers, and the wellborn.
Workers are born to work, and they usually start from bottom. Workers sell their labor to accumulate capitals.