In the Internet era, conflict is constant, invisible, and deadlier than ever. No longer is the country with the biggest army or most missiles the most powerful — instead, those wielding the best algorithm can dominate, says foreign policy strategist David Rothkopf.

We can all play a role in helping defuse even the most bitter conflicts. Veteran negotiator William Ury shares his hard-won insights.

Smart ways to handle your next heated situation, shared by Nadia Lopez. She should know — she’s a school principal.