Eleven SFF books with a powerful message of social justice

At the B&N Sci-Fi & Fantasy Blog Joel Cunningham tagged 11 sci-fi & fantasy books or series with a powerful message of social justice, including:An Unkindness of Ghosts, by Rivers Solomon

The remarkable debut novel by Rivers Solomon, extrapolates our history of prejudice and division into a future context, as the last remnants of humanity flee a ruined Earth onboard the generation ship Matilda.