Do you know what’s interesting about that list? Of the 75 names, an astonishing 14 are Americans born within nine years of each other in the mid 19th century. Think about that for a moment. Historians start with Cleopatra and the Pharaohs and comb through every year in human history ever since, looking in every corner of the world for evidence of extraordinary wealth, and almost 20 percent of the names they end up with come from a single generation in a single country.

”

— Malcolm Gladwell, Outliers