Eugenics is a 1913 address by Irving Fisher (1867-1947), the Yale economist whose work on index numbers and interest theory made him America’s most famous economic scientist. Like many Progressive Era reformers, Fisher embraced the eugenics movement, and this piece presents the case as he saw it within his broader hygiene crusades. The text is read today as a primary document of how respectable American science once promoted ideas now thoroughly repudiated, a caution worth preserving. Free PDF download available on BDeBooks.