"The world’s super-rich hold the greatest concentration of wealth since the US Gilded Age at the turn of the 20th century, when families like the Carnegies, Rockefellers and Vanderbilts controlled vast fortunes." https://www.theguardian.com/business/2017/oct/26/worlds-witnessing-a-new-gilded-age-as-billionaires-wealth-swells-to-6tn?CMP=fb_gu