Russia proposed more than three years ago that Syria’s president, Bashar al-Assad, could step down as part of a peace deal, according to a senior negotiator involved in back-channel discussions at the time.
Former Finnish president and Nobel peace prize laureate Martti Ahtisaari said western powers failed to seize on the proposal. Since it was made, in 2012, tens of thousands of people have been killed and millions uprooted, causing the world’s gravest refugee crisis since the second world war.