Sorry, but this is spectacular naivete. If there's one thing that putin has proved over the last six months it's that his word isn't worth a rotting carp in a bucket. Pay no attention to what he says, keep an eye on what he does. Hard to get reliable polls out of Ukraine but a recent one found that 89% weren't willing to give up ANY Ukrainian territory, including Donbass or Crimea, in order to get a peace settlement. Who's going to tell them to surrender, and what exactly would that guarantee, given the known putrid quality of putin's word?