What people, no matter how brilliant, thought centuries ago is no indication of what’s right.
Their thoughts, centuries ago, matter if and when we are interpreting a law that they made. For example, what would the expression "a wall of separation between church and state" have meant to our Founding Fathers?
However, since they did not make any law about abortion -- not enacted into the U.S. Constitution -- then the correct answer to the OP is:
State issue. Certainly not a federal constitutional right, other than congress lacking an enumerated power to regulate it.
