People have participated in collective work stoppages to raise the pressure on employers for more than 150 years.

The reverend and civil rights leader was a major proponent of using nonviolent protest to fight for equality.

Smartphone video, ICE-tracking apps and 3D-printed whistles have been emblematic of the protests in Minneapolis. Social movements have long latched onto and been catalyzed by new technologies.

And yet Minneapolis also offers a compelling answer to the question that democracy-loving Americans have asked for the past ...