It is proposed that this is a natural form of societies development, from earlier stages of development. In "Tribal" societies you had 3 basic classes, the "Young" who were unable to work (produce) the production class (middle age) and the old who produced less, but knew more. In Middle Aged societies you often found "Caste" based systems, as in lower class people who handled all the necessary grudge work (cleaning sewers, dealing with the dead, etc.) the 'production' class (craftsmen: blacksmith's etc), and then the 'ruling' class.
Its necessary to understand "money" at this point, as between these two types of society the biggest change was the creation of money; pre-money it was a barter system, then the transition was the creation of 'bills' for trade. To detail this by example - pretend you had Chickens and wanted to trade for a Plow, but the man with the Plow wanted a Cow. It just so happens the man with the Cow wants Chickens, so, you get a "bill" - "Good for one Cow" and give him your Chickens, take the "bill" to the man with the Plow - and everyone is Happy. This system was refined to eventually create money.
When you combine the "Caste" type system with a "Money" type system (as society naturally progresses) you end up with the 'classes' you asked about. Although there is a lot of argument about what defines each class, it is in all essence a antiquated classification system of a primitive society (that we are still dealing with).
No, he was a middle class citizen. Very unrich.
In Victorian times, rich and middle class people employed servants to do the house work.
Rich people need it poor people have it
The rich wore very nice clothing while the poor wore tattered clothing.
poor
Canada does have a middle rich and poor class. :)
She was not rich but I don't know if she was poor or middle class but I think it's middle class
middle
There is rich, middle class, and poor. I, myself, am middle class.
poor or middle class
Rich
She was neither rich nor poor, she was in a middle-class family.
was benjamin banneker rich or poor or middle class
Middle Class.
he was middle class
His family was middle class moving to upper middle class.
both and middle class. you get people on benefits (poor) working class (middle class) and people with really good jobs are quite rich. you can work both down and up.