The interest and participation levels in these institutions that "used to supply money, moral direction, and social support to marriage are quite fragile today, particularly for Americans who don't have that college degree," he added.
In her talk, "What the Contraceptive Ideology has done to America," Morse said that the sexual revolution had three main objectives: to separate sex from babies, to separate both sex and babies from marriage, and to wipe out all differences between men and women.
While Wilcox noted that the poor and working class are suffering the most from a decline in marriage and family, Morse added that children are the ones who lose the most in a society that embraces contraception and divorce.
"We're talking about a whole society built around the premise that adults can have whatever sexual activity they want and never have a baby, unless they want the baby. That is irrational to believe that that is possible. That is a fantasy," Morse said.
"If you're having sex with somebody who's [not your spouse] and would be...completely inappropriate for you to co-parent with, what are your options if your contraception fails, which it will about 13 percent of the time?"
The options for these couples are a shotgun wedding, single parenthood, adoption, or abortion, Morse noted, and in many cases, the child suffers from the parents' actions.
Because of the devastating impacts that the sexual revolution has had on marriage and family, it is all the more important for the Church to continue preaching the truths of Humanae Vitae and the beauty of marriage and family life lived out according to God's design, Archbishop Cordileone said.
In the encyclical itself, Pope Paul VI admits that this teaching will not be easily accepted by all: "It is to be anticipated that perhaps not everyone will easily accept this particular teaching. There is too much clamorous outcry against the voice of the Church, and this is intensified by modern means of communication. But it comes as no surprise to the Church that she, no less than her divine Founder, is destined to be a 'sign of contradiction.' She does not, because of this, evade the duty imposed on her of proclaiming humbly but firmly the entire moral law, both natural and evangelical."
However, those who make the best disciples and evangelizers of the truths of Humanae Vitae are those who have lived by the "secular code of conduct" and have found it lacking and even harmful, Cordileone noted.
"One of the most common responses of young people who are granted the grace of this understanding is, 'Why didn't anyone tell me sooner? It would have saved me untold suffering,'" he said.
"Such people make the most ardent disciples, and provide a much needed witness for many cradle Catholics."
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Humanae Vitae is not easy to live out, Archbishop Cordileone said, but it will lead couples to the most happiness and therefore must be taught in a way that is winsome and effective, without shying away from the suffering involved.
"The worst thing we can do...is to soften or downplay the hard parts of our faith, those teachings where we encounter the most resistance or hostility in our culture. How could we do such a thing if we are convinced that this is true, and for the true good of all people?" he said.
"We leaders in the Church do a grave disservice to our people by giving them excuses for taking the easy way out, such as misleading them with the false idea of what conscience means, or failing to assist them in forming their conscience correctly. Much to people's surprise it is actually the hard way out that is the most effective evangelizing strategy," he added.
"Rather than offering excuses for fleeing the cross, what we need are creative new ideas to help people understand the wisdom and beauty of God's design."
The point of the symposium is to bring people together who can do just that, said Dr. Matthew Muller, assistant professor of theology and an organizer of the event through Benedictine College's Gregorian Institute.
"The Symposium is a think-tank for the New Evangelization, so what is important now, I think, is that leaders at the diocesan, parish, and ministry levels, as well as the scholars and graduate students who attended, continue to reflect on the ideas they heard and develop ways to implement those ideas in their professional or scholarly work," Muller told CNA.