Perhaps no country in Latin America is more picturesque than Bolivia, and the most memorable Bolivian city may be Potosi.

Wilderness trails constitute a rare space in America marked by economic diversity. Lawyers and construction workers get bitten by the same mosquitoes and sip from the same streams; there are none of the usual signals about socioeconomic status, for most hikers are in shorts and a T-shirt and enveloped by an aroma that would make a skunk queasy.

Every high school and college graduate in America should, I think, have some familiarity with statistics, economics and a foreign language such as Spanish. Religion may not be as indispensable, but the humanities should be a part of our repertory. They may not enrich our wallets, but they do enrich our lives. They civilize us. They provide context.

The one public system in which America goes out of its way to provide services to African-Americans is prison.

The best escalator to opportunity in America is education.

In 2013, 71 percent of black children in America were born to an unwed mother, as were 53 percent of Hispanic children and 36 percent of white children. Indeed, a single parent is the new norm.