It’s interesting to read these (plausible, far from absurd) analyses from the Anglosphere when we have an alternative to compare, to whit the northern European democracies where marriage is in steep decline across all social classes yet the societies are more successful (at least if your metrics are things like poverty rates, lifetimes, nutrition, stress, etc).
First off the article says nothing about marriage it speaks of “two parent households”, so an unmarried couple raising kids would fit the author’s thesis entirely. Second, pretty sure I’d argue the recent riots in Sweden would back up exactly the author’s theory around poorly behaved young males. But hey, your nutritional rate is high!
From the article, a quote: even those who cohabit, believe that as long as they are not married, it is acceptable for either partner to walk away at any time, and for virtually any reason.