Ruut Veenhoven
Professor Ruut Veenhoven poses for a portrait shoot at the Erasmus University campus. Veenhoven is a Dutch sociologist, a pioneer and world authority on the scientific study of happiness and the director of The World Database of Happiness, an archive of research findings on subjective enjoyment of life. Photographed on April 13, 2016 in Rotterdam, The Netherlands.(Photo by Michel Porro/Contour by Getty Images)