I think the best definition of class is "functional" -- what category of function do you have in the society. I see four big categories (from the top): own th

I think the best definition of class is "functional" -- what category of function do you have in the society. I see four big categories (from the top): own the society (nobility, big capitalists), administrate the society for the owners (lawyers, teachers, bureaucrats, computer programmers etc), move objects around (carpenters, forklift drivers, janitors), do criminal stuff for the society (prostitutes, drug dealers, hit men). There are different levels of skill within each, which can make a big difference in the life of the person.