BBC World Business hears from best-selling French economist Thomas Piketty, and asks Irwin Stelzer whether Piketty's theories on wealth distribution could ever become policy.
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President Donald Trump shakes hands with President of the European Commission Ursula von der Leyen as he announces a trade deal with the EU at Trump Turnberry golf club on July 27, 2025, in Turnberry, Scotland. (Andrew Harnik via Getty Images)