Question: chaos is ladder bran stark?
Answer: He told Bran he cared for Catelyn and that he's at Winterfell to protect her children. When Littlefinger mentioned the chaos in the world, Bran stopped him in his tracks by saying, “Chaos is a ladder.” The line is a callback to the Season 3 episode, “The Climb.” Littlefinger used the phrase while talking to Varys.