On What Really Matters, Walter Russell Mead discusses the White House’s new artificial intelligence action plan, protests against Volodymyr Zelenskyy in Ukraine, a hot conflict between Thailand and Cambodia, and the role of public intellectuals throughout history.

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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)