Ideas By Jeffrey Sonnenfeld and Steven Tian February 26, 2025 7:00 AM EST Jeffrey Sonnenfeld is the Lester Crown Professor of Leadership Practice and President of the Yale Chief Executive Leadership Institute. An author of seven leadership books; he has been an informal advisor to five U.S. Presidents and led a 50-person research team which catalyzed the exit of over 1,000 major multinational firms from Russia following Putin’s invasion of Ukraine. Steven Tian is research director of the Yale

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