Like other rises in sensitivity, technology.  Ever-present smartphone cameras (and, more recently, police cameras) have made violent attacks on black men real and visceral.  And social media has made reports of violence (even without video)that would have been buried in papers much easier to find - such as Charles Blow&#x27;s son getting (mistakenly) apprehended at gunpoint on Yale&#x27;s campus by campus police.  Much like color news broadcasts made the carnage in Vietnam less palatable than past wars, and the broadcasts of the violence against Selma protesters created a swell of support for the civil rights movement, technology expands our circle of those we perceive as connected to us.