There has been a great deal of confusion about why it is so difficult to achieve a ceasefire, and why Russia insists on a comprehensive peace settlement that deals with “the root causes” of the crisis. Ukrainian President Volodymyr Zelensky now calls freezing the war...

As peace in Ukraine struggles to be born after three-and-a-half years of war, necessity prompts each of the participants in different ways. For Ukraine to achieve its best possible outcome, it must find a diplomatic way to avoid outright military defeat. Russia, by...