Re “The Heritage Foundation’s War on Gender Equality,” by Jessica Grose (Opinion, Jan. 28):

Ms. Grose’s essay criticizing the Heritage Foundation’s new family policy report offers an example of how political and social views can obscure factual evidence—in this case, what research and studies have shown actually lead to greater human flourishing and happiness.

In 1965, close to 75 percent of all American households were headed by married couples. Today, only 47 percent are. Some people see this change as a net positive, but married men and women with children consistently report higher rates of happiness than their unmarried and childless counterparts.

There is nothing regressive about wanting more children to be born to married parents. On average, children raised by their married, biological parents have better social, emotional and behavioral outcomes than children raised in single-parent homes.

Unfortunately, the nonmarital birthrate has risen from 8 percent in 1965 to 40 percent today, and one in four American children lives with a single parent—the highest rate in the world.

Policies and cultural norms that lead to lasting marriages and thriving families should have bipartisan support. It’s a mistake to see these goals as a step back for women.