First, the bad news: The Iran War shows no signs of ending soon. Tehran on Monday said it would suspend peace talks with the U.S. in protest of Israeli strikes in Gaza and Lebanon. Now, the even worse news: The Iran War is linked to the Ukraine War in myriad disturbing ways, and the longer the former drags on, the more dangerous the latter becomes. Talk of “World War III” tends to be ludicrously overwrought—crafted to generate clicks and grab eyeballs on social media, rather than highlight geopolitical risks—but the connections between these two wars have, if anything, been underdiscussed....