A clock is such a terrible metaphor. It only moves forward. And it moves forward despite any actions humans take. If anything, it is <i>slightly</i> better suited for climate change.<p>What they should be doing is providing a confidence level of nuclear war, eg 3±2% chance of nuclear war in 2018.<p>Furthermore, conflating nuclear apocalypse with other existential threats to humanity (climate change, disease, asteroid, gamma ray burst, vacuum decay, etc.) is at best confusing. I guess a general "5% chance irrevocable extinction event begins in 2018" would have some value, it would be far better to report on individual extinction vectors so we can prioritize countermeasures.