I will post that question to the mouse my cat caught and is playing with. I'll report back with an answer, if the mouse survives,
My guess is, that justice is a human concept.

It is not just a human construct it is a social construct that varies over time, location and group of people you ask. This is what makes is so hard to agree on anything related to this.
For example I will never be able to agree to many of the beliefs many US citizens seem to hold with regard to justice. I have good reasons for that but a lot of people will disagree and think those reasons are bollocks.
So there you go: an eternal struggle, never-ending debate and the only hope is to find a good compromise.

There just words so a human way to control you/ there are no rights, there is no fair and there is no justice and all will become clear when your dead.you just don't know it.