Garry Kasparov/Telegraph: Putin, like all successful dictators, relies on animal instinct, and every concession on the part of Europe’s leaders has been to him an unmistakable whiff of weakness.
Today, the only acceptable response that remains is to strip Russia of all legal mechanisms and economic resources that can be used to defend its own interests. Russia must become an international outlaw, and all of Putin’s henchmen must become pariahs no matter where they go…