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.
Answer:
Explanation:
The ancient Chinese believed that after someone died, their spirit lived on in the afterworld. The spirits of family members, who had died, watched over you. These spirits of your ancestors had magical powers.