I refuse to obey a law that treats a large portion of the population as second-class citizens.
Explanation:
At this level, people follow a moral code based on universal principles that grant all individuals certain basic rights. Society's rules take a back seat if they contradict those principles, as was the case with those who challenged slavery even when the law allowed it.
Synergistic interaction means that the effect of two chemicals taken together is greater than the sum of their separate effect at the same doses. An example is pesticide and fertilizer