In a dismal week, a rare, under-reported fragment of hope: Thursday's strikes by low-wage workers spread to almost 200 cities, jumped industrial divides - fast food to home care to airports - and merged issues of race and class, with many of the largely black and brown crowds, in the wake of Mike Brown and Eric Garner, demanding not just a living wage, but justice. See them spread, a mighty stream of righteousness, across the country.