Why do some incidents, like the recent killing of George Floyd or the death of Alan Kurdi become cause célèbres?
Of course the lives of both matter. But so do the lives of other 100 Afro-Americans killed by law enforcement or the 19,164 migrants who drowned in the Mediterranean since 2014 (according to this source.)
Why some events have the power to swing public opinion so explosively? What's the recipe?