In the 1960s, Nikki Giovanni was a revolutionary poet of the Black Arts Movement that nourished civil rights. She had a famous dialogue with James Baldwin in Paris in 1971. Now a professor at Virginia Tech, she brought beauty and courage by way of poetry after the shooting there. Today, she is a self-proclaimed space freak and a delighted elder — an adored voice to hip-hop artists and the new forms of social change this generation is creating.