The war in Ukraine has exposed how quickly peace can collapse. Europe had 70 years without a conflict between states, lulling many to believe permanent peace was the new normal. With those illusions shattered, we’re now seeing a rearmament and massive cyber security infrastructure investments by European countries to reduce their vulnerability to the predations of Vladimir Putin.The United States can learn many lessons from the Ukrainian conflict. It seems that many Americans are eager to deny the threats posed to us by our foreign adversaries. It’s been 20 years since we were last attacked on our own soil. I ...