Standing at fence and chanting, "Black lives matter! Native lives matter!" pic.twitter.com/zM0Vho65XF — Mara Gottfried (@MaraGottfried) October 4, 2015 As #BlackLivesMatter has snowballed into a potent force in activism, it's also become a bigger umbrella. Nolan Hack is a black activist who’s become involved with the social justice fight for the visibility of Native Americans.