Ukraine, since Russia's invasion, has become a critical defense laboratory for European resilience. However, the conflict also highlights that national security is as dependent on cultural identity as it is on military might.

<p>Since Russia’s full-scale invasion four years ago, Ukraine has become the world’s most consequential defense laboratory, trialing innovations that can strengthen European resilience. But the country has also demonstrated that national security depends as much on cultural identity as on military strength.</p>