We believe the world changes when the boldest thinking is directed at the toughest problems.

We believe the world changes when the boldest thinking is directed at the toughest problems.

Bill Gates

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2017 November 08	Origin: Tweet Link: https://twitter.com/billgates/status/364793441344954372 "We believe the world changes when the boldest thinking is directed at the toughest problems." -@MelindaGates http://t.co/FOpaYhIST3 — Bill Gates (@BillGates) August 6, 2013	Image evidence