Canaries in a Coal Mine. Why the United States is Experiencing an Epidemic of Indiscriminate Mass Murder
In the old days coal miners took a caged canary down into mines. If the canary suddenly dropped dead, that meant that the deadly gas, carbon monoxide, was slowly seeping into the shaft... An order of magnitude increase in killing rampages in America over the last several decades is like canaries suddenly starting to drop dead all around us. It is an early indicator of much worse troubles to come.