Ciaron O'Reilly (born 1960) is an Australian anti-war campaigner, peace protester, social justice campaigner and Catholic Worker, having been "engaged in ... protests, acts of civil disobedience and trials in England, Ireland, and his native Australia." He has also become one of the most visible and active practical and theoretical exponents of the ideas of Christian anarchism, arguing that this "'is not an attempt to synthesise two systems of thought' that are hopelessly incompatible, but rather 'a realisation that the premise of anarchism is inherent in Christianity and the message of the Gospels.'"