Tell us, just when did Prof. Ratzinger say that? Before 1968?<quoted text>
It was the respected theologian, Professor Joseph Ratzinger (now known as Pope Emeritus Benedict XVI) who said that the greatest challenge facing modern theologians is the doctrine of original sin.
Retrofitting theological doctrine that was tailor made to fit the literal Adam & Eve story to conform to current scientific knowledge is not a simply a "challenge".
From Wiki: He was originally a liberal theologian, but adopted conservative views after 1968. His prolific writings defend traditional Catholic doctrine and values.
You know the old saying, "If you are under 30 y/o and not a Liberal, you have no heart. Buy if you are over 30 y/o and are not a Conservative, you have no brain"!
So Prof. Ratzinger found God at age 41! Better late than never!!!