After more than two years of war in Ukraine, representatives of more than 90 states are at a conference in Switzerland looking for ways to achieve peace, but their views vary on how much progress is actually possible. “We have managed to give diplomacy a chance,” said Ukrainian President Volodymyr Zelensky on Saturday afternoon before the start of the peace summit initiated by him and the Swiss government on the Bürgenstock, a mountain ridge overlooking Lake Lucerne. The two-day meeting of 92 states and eight international organisations brought back the idea that joint efforts could stop a war…