I really doubt whether any just society exists in today. Rich and powerful will always bend the rules. These days the rule ~breaking~ bending is more subtle than the previous. To quote Thucydides[1] "... right, as the world goes, is only in question between equals in power, while the strong do what they can and the weak suffer what they must."

The challenge still exists for us to find a way to build more just and egalitarian societies.

[1].http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:19...