Robert Galbraith / Reuters With the publication of “The Black Family in the Age of Mass Incarceration” Ta-Nehisi Coates has added an elegant and forceful voice to the growing frustration with the inefficacy and injustice of America’s criminal-justice system. Mandatory-sentencing laws, the War on Drugs, juvenile-justice sentences that seem to do more to create than deter criminals, racial arrest and sentencing disparities: All are ready for a tough national cross-examination.