you guys need to read some hobbes and rousseau,
if you subscribe to it, there is a social contract between the people and the commonwealth of society,
outside of society, we have total liberty, such as in post-apoc movies like mad max, you can kill and take anything, but you also can only own what you can protect. For society to work, we must giveup some of our liberties, (ie the right to persue justice on our own), while we gain protection from society, and the ability to claim property, laws protect the citizens, and justice is the carrying out of those laws which protect their citizens. to say justice doesn't exist is to say there is no society.
rousseau expands further on what a true law is, and it simply states that true laws must apply to all citizens abstractly, and not specificly address specific citizens, and instances where the laws are not carried out as they state, are corruptions of the laws, and corruption causes society to crumble eventualy
so as long as true laws are enforced, there exists justice
Excuse me sir, but I have to disagree. Hobbes' conception of what is a human being is reductionist and it implies many false assumptions (e.g. that every human only thinks about his own benefit [that are are no families], that all humans are somewhat equal, etc.)