The general thinking is that a law is unjust if it doesn't square with natural law. This is certainly the view that was put forth in Martin Luther King's Letter from Birmingham Jail.
So, a law that was passed that treated people differently wouldn't square with the natural law that all humans are equal. And thus, one would have the obligation to disobey that law.
Roman’s officials laws were responsible for making sure that people followed them. At first these laws were the patricians who had made them.
Answer:
The Incas relied on trade with the Andean cultures for no-agricultural goods.
or
The Incas conducted little trade as the emperor owned all property
Explanation:
I'm not sure what your doing (I have little information on what this is) so i hope one of these work!!