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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A production line of the Glide, a high-altitude glider that delivers munitions across thousands of miles, is seen at the defense tech startup Mach Industries in Huntington Beach, California, on September 11, 2025. (Getty Images)