The Constitution is the law.
The founders made it clear in the Preamble, the pretext for the document, that it was written and enacted to "secure the Blessings of Liberty to ourselves and our Posterity."
They wisely put future generations, us, on equal footing with themselves when it came to the right to enjoy the Blessings of Liberty.
Then, in the Fifth Amendment, the very heart of the original Bill of Rights, they made it very clear:
"No person shall be...deprived of life...without due process of law..." [ie a fair trial on a capital offense.]
The Fourteenth Amendment, added much later, simply expands on what was already clear in the Fifth.
As far as I know, every State constitution contains identical language...some of them adopting the immortal pro-life words from the Declaration as well.
If you're a sane person, and can recognize the simple self-evident fact that an unborn child is a person, you can't then argue that they aren't therefore protected by our Constitution. Not even Blackmun was foolish enough to assert that. He had to invent the fiction that the unborn aren't people.
Get some states to ban abortion. Uphold those bans.
Then have someone challenge legal abortion laws to SCOTUS. Someone with standing, such as the father of a child that was aborted. Maybe then there will be a fetus/personhood ruling. Remember that SCOTUS will turn aside cases where there is no standing or tort.
That is what I mean by activist. Ruling when the ruling is germane. The ruling has to come to SCOTUS. With Roe, Douglas helped engineer getting the case to SCOTUS.
You’ve been refuted on this issue so many times that I can’t keep count.