Tuesday briefing: With the horror of conflict throughout the globe, how likely is world war three?

In today’s newsletter: Our diplomatic editor on how global instability feeds into conflict in so many parts of the world, and whether the threshold for a major global war has been met Good morning. The world is at war. From the trenches of eastern Ukraine to the missile-streaked skies of the Gulf, a growing proportion of humanity is living under the horror of conflict. For some observers, there are gnawing fears that the worst is yet to come. The apparent collapse of the rules-based internationa