The future evolution of the human might not be marked so much by his physical change, as by his moral development. I will offer three arguments in favor of the thesis that humanity is gradually moving in the direction of superior moral relations, i.e. the configuration of individuals and societies with an expanded inclination toward justice. The first argument is Kant's, the second Doyle's (which is in fact an indirect argument), while the third one is my own contribution to the discussion. All three arguments I will not only present, but also explain how they relate to each other. I will conclude that the thesis about the gradual development of humanity in the direction of social relations with a stronger foundation in justice can be cogently substantiated.