Board Thread:Lore Discussion/@comment-26213507-20150928140042/@comment-26213507-20151007143838

The Dominion definitely benefit the most regardless of who wins. I don't think he is a Thalmor agent, but he is merely a tool. I think a few "wise men" who were actually paid off or were Thalmor agents in disguise might have talked to Ulfric. They filled his head with the thought right after his torture, which caused him to want to do what he did. In essence, The Dominion did cause the war in this case.