Watch this Masterclass from Robert Reich, former United States Secretary of Labour, Professor at UC Berkeley, and campaigner against inequality.

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Is some inequality both inevitable and necessary? At what point, if ever, does it become a problem? What’s the difference between income and wealth inequality, and which is more important? How do income and wealth inequalities overlap with race and gender? And the real puzzle: why did these inequalities begin to widen so dramatically starting in the late 1970s and early 1980s, and continue widening since then?