It's interesting that your article references slavery. The treatment of unborn children has some parallel to the political mindset that came up with the Three-fifths Compromise. This was an agreement reached during the 1787 United States Constitutional Convention over the counting of slaves in determining a state's total population. This count would determine the number of seats in the House of Representatives and how much each state would pay in taxes. The compromise counted each slave as three-fifths of a person for the purpose of apportioning the House of Representatives.
If Mary, the mother of God and the Jews that surrounded her were liberals, Jesus would have been aborted. We know that scientifically, the fetus or zygote if you will, contains the same number of chromosomes as you and I, i.e., he or she is human.
The Lord through scripture offers us His view of unborn children:
Jeremiah 1:5 “Before I formed you in the womb I knew you, and before you were born I consecrated you; I appointed you a prophet to the nations.”
Isaiah 49:1 Listen to me, O coastlands, and give attention, you peoples from afar. The Lord called me from the womb, from the body of my mother he named my name.
Psalm 139:13 For you formed my inward parts; you knitted me together in my mother's womb.
Job 31:15 Did not he who made me in the womb make him? And did not one fashion us in the womb?
Isaiah 49:5 And now the Lord says, he who formed me from the womb to be his servant, to bring Jacob back to him; and that Israel might be gathered to him— for I am honored in the eyes of the Lord, and my God has become my strength—
Isaiah 44:2 Thus says the Lord who made you, who formed you from the womb and will help you: Fear not, O Jacob my servant, Jeshurun whom I have chosen.
Isaiah 44:24 Thus says the Lord, your Redeemer, who formed you from the womb: “I am the Lord, who made all things, who alone stretched out the heavens, who spread out the earth by myself,
Psalm 127:3 Behold, children are a heritage from the Lord, the fruit of the womb a reward.
Psalm 139:16 Your eyes saw my unformed substance; in your book were written, every one of them, the days that were formed for me, when as yet there was none of them.
Galatians 1:15 But when he who had set me apart before I was born, and who called me by his grace,
Luke 1:41 And when Elizabeth heard the greeting of Mary, the baby leaped in her womb. And Elizabeth was filled with the Holy Spirit,
Psalm 139:13-16 For you formed my inward parts; you knitted me together in my mother's womb. I praise you, for I am fearfully and wonderfully made. Wonderful are your works; my soul knows it very well. My frame was not hidden from you, when I was being made in secret, intricately woven in the depths of the earth. Your eyes saw my unformed substance; in your book were written, every one of them, the days that were formed for me, when as yet there was none of them.
It appears most people twist and don’t understand that the concept of a slave being 2/3 rds of a person. It was the equivalency of a person. They were not persons; they were property in the southerners eyes.
The proabortionists also do not say the unborn as a person while the prolife see the unborn as a person.