The major works of Roland Allen is reviewed in this article. Allen (1868-1947) served as a missionary in North China until ill-health sent him home. After a few years in parish ministry, he spent the rest of his life in research and writing. Largely ignored in his lifetime, by the 1960's Allen had become a household name among missiologists. His strategic thinking pointed a new way forward at a time when churches had grown tired of being told how to do things by foreigners, however well-meaning. Now that Western Europe has become one of the world’s neediest mission fields Allen speaks to us in a new way.