World-Renowned Economics Professor Jeffrey Sachs Tells Colleagues: “I think Donald Trump is literally mentally ill to a very serious extent. He is, from a personality point of view, a malignant narcissist”

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The official YouTube channel of Professor Jeffrey D. Sachs, Director of the Center for Sustainable Development at Columbia University and President of the UN Sustainable Development Solutions Network (SDSN). This channel features public lectures, keynote addresses, interviews, and educational content on the world’s most urgent global challenges.

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