The Prime Minister, David Cameron, will make his case for bombing ISIL in Syria this week. Some commentators are predicting that, if parliament votes in favour, the raids could start as early as next week. This will mean our going into a coalition not only with France and America but also with Russia - a country that has been a long-standing ally of the Syrian leader President Assad, the man whom we wanted to bomb only two years ago. The adage "my enemy's enemy is my friend" dates back at least to the 4th century BC. It might be harsh to say that we're basing our foreign policy on an ancient proverb from a Sanskrit treatise on statecraft, but it's hard to avoid the parallels. Is it, though, a moral justification for going to war? On the Moral Maze this week we discuss what is meant by the phrase "just war" and the morality of pacifism. Has the pacifist case been heard enough? Chaired by Michael Buerk with Claire Fox, Giles Fraser, Michael Portillo and Melanie Phillips. Witnesses are Dr Alexander Moseley, Richard Norman, Helen Drewery and Richard Streatfield.