Nato’s 70th anniversary: Milestone marks power of solidarity

Flux is the permanent state of human affairs: Empires rise and fall, despots come and go, alliances are built only to fall apart, social norms once thought inviolable are thrown aside.
Every now and then, we inflict catastrophic harm on each other. Sometimes, that harm is so visceral, so in-the-marrow, that we try to overcome differences, so it might not be repeated.