Situations and perceptions do of course change, but the main principles
of justice that are accepted by society are intended to be stable and lasting;
otherwise they would infringe on the premises of fair play that are at the
heart of the way any community functions. From this, we can deduce that
if the rules that are accepted by society generate inequalities, then those
inequalities must also be acceptable to the society so that they are defended
by all, regardless of the position each individual is in.