Western philosophy’s most well-known concept is that of justice, yet its vagueness has resulted in both philosophers and jurists failing to agree on its exact meaning. Its lack of a solid, defining characteristic leads individuals to maintain their own perception of justice, accepting and attributing various characteristics to their understanding of it. However, what remains a defining characteristic of justice, is its tendency to “attack and replace all theories that came before it”. In the words of Hans Kelsen, "man cannot find a definite answer but can only try to improve the question".
— Josh Prior