Let us now praise single moms

Roughly 24 million, or one-third of all American children under age 18, are living with an unmarried parent, according to a 2018 Pew Research Center analysis of US Census Bureau data. And 81% of those single parent homes are headed by a mom.

This has been a growing trend since the late 1960s. The number of kids being raised by mostly single moms has more than doubled between 1968 and 2017.

Yet despite growing up in the middle of this trend, in the 1970s and ’80s, when divorce was increasingly common and...