How do we stop these five magic users from blowing up the world (again)?

You, along with four others- a vampire, werewolf, demon, and angel- were all once mortal politicitions. Not too long ago, the world was on the brink of nuclear war, and in a last ditch effort to save the world from mutual destruction, you each made a pact with a powerful being of a different faith. <br><br>The angel, vampire, and demon were a package deal from trading your souls to the (Catholic) Devil, who was sick of watching the world he invested so much in nearly crumble without him getting to see it ripened to perfection. Another politician traded his memories of his family and friends to a pack of werewolves for the ability to shapeshift. The last politician went a slightly more scientific route and made a Faustian bargain with an artificial intelligence that granted him the body of a cyborg, nearly destroying his mind in the process.<br><br>None of you could have predicted that all five of you would be elected world leaders, but it happened. The first time you all met on neutral ground ended in war. The second time you all met on neutral ground ended in war. The third time you all met on neutral grounds is now, and if it ends in a war, it will also end in the apocalypse. <br><br>World leaders are on standby waiting to hear the results of the meeting, and having been the only magic user to not cause a war during the last two meetings, you're in charge of making sure everything goes right this time. What actions do you take, and how do you (or do you) manage to keep the world safe from annihilation?<br><br>**TL;DR:** Five world leaders each have different, not super man-like magical powers. Three of them have already caused two wars. How do I stop them from blowing up the world this time when we meet?