Hans Rosling (1948–2017) was a Swedish physician, professor of international health, and world-renowned public educator. As a co-founder of the Gapminder Foundation, he gained global authority by using rigorous data to challenge common misconceptions about global development. His expertise was built on decades of frontline medical research in Africa and advisory roles for the WHO and UNICEF, ultimately making him one of the world’s most influential voices on global health trends.