If North Korea matches its warlike rhetoric with actions we are all in trouble. Kim Jong-Un may not have inherited the kind of nuclear warheads from his father that are ready to be put on to long-range missiles.
But he could still decide to pulverise much of South Korea with an intense conventional bombardment. Japan is also within North Korea's range, as are American bases in North Asia. There is a worrying precedent for the involvement of the major powers. More than 60 years ago when the North launched a major attack on the South, both the United States and China became embroiled in a costly and inconclusive conflict. New Zealand and Australia were involved, too.
A replay of that history is not impossible, but it is not particularly likely, either. North Korea has a long record of issuing threats which exceed what it is really planning to do, and the distribution of power is not in its favour. South Korea today boasts a strong military force, and is backed by its ally the United States. North Korea's ability to harm those around it is more than matched by the capabilities that are arranged against it, and more of those are now on the scene as the United States has beefed up its presence near the peninsula.
North Korea also has a major power ally in China. But Pyongyang should know that it is losing Beijing's patience. China does not feel ready to abandon North Korea, which occupies an important strategic position and which is led by a fellow communist regime. But if Kim Jong-Un led his country into a major war this year, he could not assume that Beijing would be there to support him.