Adrian Piper (b. 1948 in Bronx) is a conceptual artist, author, and philosopher. Her work addresses gender identity, ostracism, otherness, racial "passing," and racism. Although I didn’t find sites describing her explicitly as a performance artist (I’m not sure why, perhaps it’s due to her own preference), I would characterize much of her work loosely as “performance art” for lack of a better term. Nevertheless, I feel she is a change agent and an awareness seeker.