The alliance has brought decades of peace to Europe and enabled the U.S. to shape events on the continent.

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Donald Trump does not understand NATO. Neither does he understand alliances, let alone alliance leadership. Nevertheless, based on animosities and grievances he has harbored in his ignorance for multiple decades, he appears disposed to allow the most successful political-military alliance in modern history to be destroyed.

Eric S. Edelman was undersecretary of defense for policy (2005-2009) and has served as the co-chair for the congressionally mandated Commissions to review the National Defense Strategy in 2018 and 2024.