In four years, Black Lives Matter went from a hashtag about social injustice to a full-fledged global civil rights movement. Metro spoke with Patrisse Cullors, who cofounded Black Lives Matter with Alicia Garza and Opal Tometi in 2013, about its evolution, fighting racism in the age of Trump, her upcoming memoir and what saying “all lives matter” really means. What is the biggest misconception you find people have about Black Lives Matter? Patrisse Cullors: That we just started a hashtag. That it isn’t a sophisticated set of ideas that would lead to a larger strategy to build out, a powerful...