Escalation

While much discussion ensured after Putin threatened to use nuclear weapons two days ago, that's only one avenue for escalation. The other and more likely path is the increasing used of indiscriminate shelling and bombing resulting in huge loss of civilian lives. The longer the invasion goes without Putin reaching his goal of regime change, the more desperate he will get and the more extreme and more violent the Russian forces will be told to be. Unless he is stopped, or unless Ukraine capitulates which seems unlikely, Putin will raze the country to the ground.