Saudi-Iraqi relations have been in the deep freeze since Iraq’s invasion of Kuwait in 1990. But the relationship, while still somewhat frosty, is improving and the last week has seen a flurry of high level bilateral visits. Saudi Energy Minister Khalid al-Falih spoke in Baghdad on 21 October, before Iraqi Prime Minister Haidar al-‘Abadi led a delegation to Riyadh on 22 October.

The economic rationale for Iraq is clear. Its struggling economy has never recovered from the years of...