if there is not a middle class, than I must be poor, since I am definitely not rich.
Definition of rich, middle and poor really depends where you live, what is your country standard.
To be reach in Africa or USA is really not the same category.
But, some people consider not just material wealth, money but also family, happiness, health as important parts or requirements to be reach.
Think about this.
What does happiness have to do with social class it is completely irrelevant,subjective.