Syria’s war is far from over but it is already the subject of a large number of books – many about the internal dynamics of the conflict or the headline-grabbing jihadis who dominate perceptions of it. Christopher Phillips’ impressively-researched study of its international dimensions is an important contribution to understanding the bleak story so far. Based on interviews with officials and a mass of secondary sources, it identifies and examines the key external components of the worst crisis of the 21st century: the fading of American power, Russian assertiveness, regional rivalries and the role of non-state actors from Hezbollah to ISIS
