The much-heralded Trump-Putin call has not produced a breakthrough in the Ukraine peace process, but it may have advanced it. Russia’s agreement to a 30-day mutual halt to attacks on energy infrastructure is a sign that Putin wishes to negotiate peace (naturally, on terms acceptable to Russia), and is prepared to make a limited but significant concession in order to move the negotiations forward. Trump and Putin have also reportedly agreed on “immediate, technical-level meetings” to start drawing up the details of a comprehensive peace settlement.