Onora O'Neill: What we don't understand about trust

Trust is on the decline, and we need to rebuild it. That’s a commonly heard suggestion for making a better world … but, says philosopher Onora O’Neill, we don’t really understand what we're suggesting. She flips the question, showing us that our three most common ideas about trust are actually misdirected. (Filmed at TEDxHousesofParliament.)