Two years after a police officer killed George Floyd outside a Minneapolis corner store, videos of police violence still appear regularly – and protests follow. Maybe the closest parallel to what's happening today is the so-called "long hot summer" of 1967, when more than 150 cities across the country experienced civil unrest. What the so-called "Kerner Commission" concluded — shocking to many Americans – was that the fires in America's cities could be traced back to inequality, white racism, and police brutality.