All ideas about fairness can be divided into two broad groups.

What are these two broad groups?

It's not fair if and it's not fair if

A$.$ the poor are not made as well off as possible; private property is transferred from one person to another by methods other than voluntary

B$.$ some people live in democracies and others live under communism; some people live in opulence and others live in squalor

C$.$ the result isn't fair; the rules aren't fair

D$.$ some people are educated and others are not; free trade takes away jobs from one country and gives them to another country