BRITISH TROOPS only ended operations in Iraq at the end of May, and already a new conflict is underway in Libya. The new war has been a game-changer in a number of ways. Most obviously, it marked the “second wave” of the Arab Spring, the revolutions in Tunisia and Egypt appearing smooth and rapid in comparison to the drawn out street battles in Bahrain, Syria and Yemen. But it also proved to be the point at which support for “humanitarian intervention” was once more acceptable after the Iraqi quagmire.