"Simulations like this one are not supposed to predict the future. The outcomes depend on the design of the game and the relative personalities and experience of the players. Many of those in the room lacked first-hand diplomatic and national security experience. The UN forum, which organizers selected as the game’s setting, may also not be as effective as talks between smaller groups of major countries."

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This paragraph deserves emphasis to balance out the doomer linkbait headline.

The players of this game largely ignored scientific opinions and played politics like it was a fun board-game. Presumably, they did have fun. Notably missing from this wargame was the kind of pressure that real leaders and diplomats would face to swallow their pride, eschew fun, understand the science, and get the solution right. It's just our planet and civilization on the line, right?

It would be deeply foolish to use this wargame to discount or disparage the UN. Under more realistic conditions they could get it right, and they might be our best hope for preventing one or a small number of governments from acting unilaterally and getting it tragically wrong.