'Ignorance and Liberty' examines how the market is a place which liberates us from this idea of a privileged source of knowledge. The market is not only a place where goods are exchanged but also where different philosophical ideas and religious beliefs must co-habit, opening up new horizons and undermining the sense of an absolute that prevails in a closed world. Those with a belief in open society base the demand for liberty on the recognition of human ignorance; we need to be free because we are ignorant and fallible.