Justice is not necessarily a moral concept, it's quite a reasonable concept as well. Laws are about reason in the sense that they're things we can convince maj

Justice is not necessarily a moral concept, it's quite a reasonable concept as well. Laws are about reason in the sense that they're things we can convince majorities to abide by; sometimes those justifications are moral, but being immoral is not a justification to be illegal as morals themselves are fluid and what is moral for one isn't for another. As there are no absolute morals, laws are thus based on reasoning between moral beings as to what they can agree to.