Why do people discriminate against others who are not like them? One possible reason lies in our evolutionary past, when such discriminatory predisposition was necessary for the survival of our tribe. Today, this tribal psychology manifests in the way we tend to differentiate between us and them; sometimes, with ill-will and hatred. How can we, as Buddhists, train our minds to undo this deep-seated tendency? How do right understanding, mindfulness and meditation help?