For a class action to work, the court wrote, the representative plaintiffs who hold the power to end all litigation over the matter for everybody else must share the same motivations as the rest of the class.
"This litigation attempts to close that gap in accountability and hold corporations - who, by the way, made millions and millions of dollars from US government work in Iraq - accountable, and give back some of those extravagant profits to individuals they harmed, " said Mr Azmy.