This possibility makes the other approachable. By approaching each other, we form the basis for shared relationships and thus community. To answer this question I return to Philosophy's roots and reread Plato's Republic. In the Republic the question of Justice is debated between Socrates and Thrasymachus. Socrates maintains that Justice exists independently of people's attempts to change its meaning.
Democratic regimes define democratic values as being just.
Totalitarians define totalitarian values as just, and so forth. Each regime defines their own justice. This critique of justice shows that power and politics play into the formulation of values. This question calls attention to the strife that permeates our society because of power differences. From the home with man and wife, at work with worker and capitalist, in politics between the enfranchised and disenfranchised, in the economics between the have and have-nots, power inequality exists at all levels.