My main concern is that in Putin, we have a dying and cancer ridden old man with a gigantic ego suffering humiliation. How will he react? It could be a global catastrophe.Yes and no. Russia certainly can't defeat Ukraine now, given all the help the West is giving. It's a proxy war now, Russia versus the West
But dictators actually tend to last for a very long time,far, far longer than democratically elected leaders, and the disadvantage for us will show in the way Russia is unwisely being driven eastwards. The world is splitting into two halves.
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As much as it grinds my pipe, the way out of this with minimum loss of life, is to give Putin / Russia a face-saving way to climb down and for him to escape war crimes proceedings. Then assassinate him if the cancer doesn’t eat him first. Rubbing his nose in it (the Liz Truss & Cowardly streak of pi$$ approach), is dangerous.