Our world has been through a lot over the centuries but the current increasing tension buildup between the world superpowers could lead to the nuclear war. Russia's aggression in Europe — its invasion of Ukraine, its military flights up the noses of NATO states, its nuclear saber rattling — has faded from the news. But it's still very much a threat, which is why the US is planning to quadruple its military spending in Europe, something NATO's European members have welcomed, to deter Russia. In other words, the dynamics that brought Cold War–style military tension to Europe in 2015 are still with us. And that tension can be dangerous. A survey of 100 policy experts yielded an aggregate assessment of 11 percent odds of war and 18 percent odds that such a war would include nuclear weapons. In late January, scholars with the Zurich-based Center for Security Studies produced a map, as part of a longer report that you can read here, that helps show why this is still a real issue: Russia