What could be the most likely cause for a world war 3?
4 years ago I would've said Donald Trump, but much to my amazement (and relief) the utter fool didn't start a war with North Korea or Iran. He sure tried though.
Given the threat of nuclear war I don't think it's possible for a WW3 to break out. You'd also need a big power to fight another and they all seem to be allies or at least economically dependant on one another.
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