"World change" is such an amorphous ambition. To get a clearer picture of what that looks like on the ground, consider this statistic from San Francisco's Human Services Agency: income inequality in the cradle of innovation is now par with Rwanda.

As part of a week-long exploration of income inequality in the midst of an economic boom, NPR has matched some faces with abstract dots on a map, demonstrating that you can work for Google and still go hungry.