After the Baltimore unrest last month, there were two divergent reactions: the center-left, center, and right reacted with stunned outrage, arguing that any such violence or looting is illegitimate. The left countered, arguing that this was a double standard given continual police violence, and that rioting might even work politically, by drawing attention to otherwise ignored problems. Jonathan Chait, somewhere between the center and the center-left, has returned to the argument armed with new evidence.