There are two ways of looking at the world – through faith and superstition or through the rigours of logic, observation and evidence – in other words, through reason. Reason and a respect for evidence are precious commodities, the source of human progress and our safeguard against fundamentalists and those who profit from obscuring the truth. Yet, today, society appears to be retreating from reason. Apparently harmless but utterly irrational belief systems from astrology to New Age mysticism, clairvoyance to alternative health remedies are booming. Richard Dawkins confronts what he sees as an epidemic of irrational, superstitious thinking...