When I was writing “Reign of Error,” I researched the proportion of children who live in poverty and learned from what seemed to be the best source (UNICEF) that the United States has the highest child poverty rate of any advanced nation. Actually, UNICEF in another report says we have the second highest child poverty, second to Romania. However, I have been to Romania, and it does not belong in the same ranking with the United States, Norway, Finland, Sweden, France, the U.K., and other Western European nations. Unlike them, Romania is and has long been a very, very poor country.

Another survey by the Southern Education Fund recently found that 51% of American children live in “low-income” homes. In 40 of the 50 states, low income students comprised no less than 40 percent of all public schoolchildren. In 21 states, children eligible for free or reduced-price lunches were a majority of the students in 2013.

Recently I have noticed that apologists for America’s yawning income inequality say either that child poverty doesn’t matter (“great” teachers can overcome it) and/or that we don’t really have so many poor children. Some have even said that poverty is just an “excuse for bad teachers.”

Here is an addition to that discussion by Matt Bruenig in Demos. In this post, he ranks the advanced nations and shows that the U.S. does have an exceptional child poverty rate. It shouldn’t be necessary to explain why poverty matters. Children who are poor tend not to get medical care when they need it; tend not to have educated parents; tend to have more school absences, because of illness; tend to experience periods of homelessness. As compared to children who grow up in secure, middle-class homes, children in poverty carry many burdens not of their making. Western Europe tries to reduce poverty and to make health care and child care accessible and free.

Given the well-known correlation between poverty and low test scores, it seems reasonable to believe that the most effective way to improve school performance would be to reduce poverty.

How could we do that? Bob Herbert’s book Losing the Way suggests the answer: rebuild our crumbling infrastructure. This would create millions of jobs and improve the lives of millions of families. Or better yet, read this article in the New York Times about our collapsing bridges, tunnels, dams, and highways.

We spent 2 trillion on the wars in the Middle East in the past decade. How about spending the next 2 trillion to rebuild our country?