There were 664 homicides in Chicago in 2017 and, for comparison, 37 casualties in the U.S. military in its myriad operations around the globe. That’s according to data from the Chicago Tribune and from the Department of Defense’s press office. The Chicago deaths are for the period Jan. 1, 2017 through Dec. 31, 2017; the military deaths are from Jan. 1, 2017 through Dec. 22, 2017, which is the latest update on casualties by the DoD posted so far. (There may have been a few more military casualties in December.) From the data available, it shows that Chicago suffered 17.9...