I saw a question today asking which one is correct, and the answer is (2)
(1)
Literacy opened up entire realms of verifiable knowledge to ordinary men and women having been previously considered incapable of discerning truth for themselves.
(2)
Literacy opened up entire realms of verifiable knowledge to ordinary men and women who had previously been considered incapable of discerning truth for themselves.
Question:
I originally thought both are ok because I remember adjective clauses involving participles, both "which had.." or "which have...", can be reduced to "having..."
Am I wrong? Or there are other reasons that make (2) the answer?