The deal struck by the US and Russia triggered widespread relief in most Western capitals, where political leaders simply are not prepared for military intervention, even if Syria’s government is killing its own people with poison gas (on this score, the agreement amounts to a confession by Assad). After a decade of war in Afghanistan and Iraq, the West would rather stay at home; neither the US nor the United Kingdom – nor most other NATO members – wants to become entangled in another Middle East conflict that cannot be won.