Slavery and abortion have a common link. The 1973 Supreme Court declared in Roe v. Wade that the unborn child is not a person, and the 1857 Supreme Court declared in the Dred Scott case that a slave is not a person. In both cases, nine men in black robes made decisions adversely affecting the lives of millions.
A government without moral absolutes makes abhorrent decisions of this nature. One decision was made for selfish economic reasons and the other decision was made for selfish personal convenience. Without moral absolutes, there can be no certain justice.
Everything in government and law is determined by those who have power. Ultimately, justice becomes what people in power say it is. That said, evil is inherent in human nature and no amount of legal maneuvering can eliminate its influence. People with Christian values must be in leadership roles if a republic is to succeed. Without this being the case, the republic will slowly crack and ultimately fall into decadence.
It’s common to refer to democracy as a government of laws and not men, but that’s not true. Character and personal values of those in power influence the decisions and determine the direction of that nation.
People typically elect those who share their values. Thus, leadership reflects the state of the people.