Hans Rosling was a Swedish physician, academic, and public speaker. He taught international health at Karolinska Institute and co-founded the Gapminder Foundation, which created the Trendalyzer software. Rosling was renowned for his global presentations, especially his TED Talks, where he emphasized the importance of data visualization for understanding development issues. His book "Factfulness," co-written with his son Ola and daughter-in-law Anna, posthumously became an international bestseller. 27 July 1948 – 7 February 2017)