A little bit of conditioning in a book…

More than that, "Harry Potter" has been found to be especially helpful in reducing kids' latent biases: Perspective-taking, wrote researchers of a 2014 study, "emerged as the process allowing attitude improvement" toward immigrants, homosexuals, and refugees when people sided with Harry over Voldemort.

http://www.businessinsider.com/adam-grant-jk-rowling-is-the-worlds-most-influential-person-2015-8