The violence that has engulfed Baltimore is visible and heartbreaking evidence of a city that has been under siege for decades.

The obvious flashpoints involve race and policing. But since at least the 1970s, the economy’s invisible hand also has been diligently stripping tens of thousands of blue-collar jobs from what was once a bustling workshop where steel, cars and planes were made. Baltimore has tried to do its best in a post-industrial economy, but when work disappears, the results can be catastrophic.

Read R.J. Dionne’s entire Op-Ed Here