Ideas worth spreading

How not to be ignorant about the world

6,376,518 views | Hans and Ola Rosling • TEDSalon Berlin 2014

How much do you know about the world? Hans Rosling, with his famous charts of global population, health and income data (and an extra-extra-long pointer), demonstrates that you have a high statistical chance of being quite wrong about what you think you know. Play along with his audience quiz — then, from Hans’ son Ola, learn 4 ways to quickly get less ignorant.

How much do you know about the world? Hans Rosling, with his famous charts of global population, health and income data (and an extra-extra-long pointer), demonstrates that you have a high statistical chance of being quite wrong about what you think you know. Play along with his audience quiz — then, from Hans’ son Ola, learn 4 ways to quickly get less ignorant.

This talk was presented at an official TED conference. TED's editors chose to feature it for you.

About the speakers

Hans Rosling

Global health expert; data visionary

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In Hans Rosling’s hands, data sings. Global trends in health and economics come to vivid life. And the big picture of global development -- with some surprisingly good news -- snaps into sharp focus.

Ola Rosling

Director of the Gapminder Foundation

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Ola Rosling is the director and co-founder of the Gapminder Foundation. Previously, he was the Google Public Data product manager.

This talk was presented at an official TED conference. TED's editors chose to feature it for you.