Ukrainian President Volodymyr Zelensky has warned against attempts at “freezing” the Russian war against his country and says the world needs to help stop the conflict now to avoid Moscow starting another “catastrophe” elsewhere. “Any frozen conflict will eventually ignite,” he told the World Economic Forum in the Swiss resort of Davos. He is in favour of deciding the war on the battlefield and inflicting a strategic defeat on Russia “this year” rather than a long-lasting ceasefire which may give Moscow some Ukrainian territory. Zelensky recalled attempts by former German chancellor Angela Mer…