Natural Law: Part 4
More Holes and Weaknesses in Natural Law and the future for sexual love
Part 1 dealt with the Natural Law.
Part 2 considered the male and female perspectives of Natural Law and the Church’s teachings on sexual morality, and recent learning from experts in evolution.
Part 3 considered examples of the world’s expertise in science and learning relating to the Church’s sexual morality teaching and assessed the Church’s teaching in the light of these critiques, and its response.
Now in this final section, Part 4, we consider more expert criticism of the use of Natural Law and Church’s sexual morality teachings about homosexuality. We critically assess what is called “New Natural Law” and its treatment of homosexuality. We conclude by examining Thomas Aquinas’s Homosexual Deception, and how this reinforced the Catholic Church’s treatment of homosexuality as a grave sin. The Church now needs to reassess whether it is transmitting the Truth about sexually expressing love in human relationships.
Natural Law and Homosexuality
Natural Law and Homosexuality are discussed in Stanford University’s Encyclopedia of Philosophy and this finds significant holes in the Catholic Church’s defence of its current Natural Law teaching. It’s clear that when Natural Law can’t defend the Church’s teaching it falls back on what it claims ‘God says’ to rescue the argument. We hear from some fresh contemporary experts, ones we did not meet in part 3. ¹
Sterile marriages and homosexual relationships
The Church makes procreation the ‘natural fulfillment’ of marriage, but this denigrates sterile marriages where one or both partners is infertile, and also devalues vaginal sex within marriage after a woman’s menopause. Yet vaginal sex within sterile and post-menopausal marriages is not morally wrong and the Church agrees these marriages are perfectly valid and acceptable. Why, people reasonably ask, is homosexual sex in the same context wrong (in a long-term committed relationship, such as a civil partnership, or lesbian or gay marriage)? ²
The Natural Law response to any suggestion that sex within lesbian and gay marriages and civil partnerships should be allowed, is to defend the Church’s teaching by saying that while vaginal intercourse within a sterile marriage is potentially procreative (considered in itself), sex within same-sex relationships is never potentially procreative. ³
But is this biological distinction also morally relevant and persuasive, and in the way that Natural Law theorists assume?









