Almost no doctrine is more controversial than 'original sin'. It has branded the Gospel as a dark message in the minds of many people - but most Christians just have a foggy notion of what it might mean. In this important talk, Tony challenges the mental models behind 'original sin' and then gives us a much richer model for sin - its beginnings and its imputation. Tony uses Romans 5 and the 'two Adams' to shine a better light on the topic, and then leaves us with suggestions as to how we might frame the gospel differently in the light of these insights.