Silicon Valley has achieved a level of prosperity unmatched in human history. We’re geographically smaller than Rhode Island, but our collective wealth and regional output are on the scale of a G7 nation. Yet we also have the world’s most pronounced income inequality, and our wealth gaps are staggering. The top tenth of Valley households hold 75% of the wealth; the bottom half, less than 1% of it. In the 1990s, we were mostly a middle-class community with the normal range of outliers.