Though racial discrimination exists, it is nowhere near the barrier it once was. The relevant question is: How much of what we see today can be explained by racial discrimination? This is an important question because if we conclude that racial discrimination is the major cause of black problems when it isn’t, then effective solutions will be elusive forever. To begin to get a handle on the answer, let’s pull up a few historical facts about black Americans.

In 1950, female-headed households were 18 percent of the black population. Today it’s close to 70 percent. One study of 19th-century slave families found that in up to three-fourths of the families, all the children lived with the biological mother and father. In 1925 New York City, 85 percent of black households were two-parent households. Herbert Gutman, author of “The Black Family in Slavery and Freedom, 1750-1925,” reports, “Five in six children…