indonesia, i've got family whose gene pool stretches from ireland to china. i've got lifelong friends who come from just about every corner of the world, and that background helps explain my core belief in the oneness of humanity. a belief in the god given dignity and worth of all people and the underlying bonds that we share. it's why i believe america's diversity is a strength, not a weakness. and that the only way we can solve our biggest challenges from climate change to the economic inequality is if we recognize those common bonds, and learn to work together across divides of race and religion and language and culture. but as strongly as i hold to that belief, chicago taught me the change doesn't start on a global scale. change starts one person at a