Science defines understandably that brain activity begins at a certain point in the pregnancy You used a fundamentalist website as a source.
considering I never even mentioned brain activity your strawman is noted. Nope, I used it to show that the person I was responding to is at odds with the very people they relate to.
Slaves in most cases were not paid for their labors, plus many of them lived in squalid inhumane conditions. Society decided to change it. Just like Roe vs. Wade; society decided to change it with the help of SCOTUS. If society decides to reverse it, they will do it.
