Over the past century, African-American life expectancy and education levels have soared

AT THE turn of the twentieth century, a newborn white American could expect to live for around 48 years. That was 15 years longer than a newborn African-American could expect. Improvements in hygiene, medicine and other public-health measures led those numbers to rise dramatically. By mid-century, life expectancy for African-Americans had nearly doubled, to 61 years, while for white Americans it rose to 69. By 2017 the gap had narrowed further, to three and a half years: 75.3 for African-Americans, 78.8 for whites. But Hispanic Americans outlive them both, to...