In The Missionary Spirit Jerry Ireland explores the history of mission activity in Pentecostalism, and argues for a return to its early emphasis on the need to engage in cross-cultural evangelism, as opposed to a broader, more amorphous understanding of Pentecostal missiology as "everything that God is doing in the world." Instead of separating "mission from missions, or the broad sense of mission from the narrow sense," Ireland says that both senses of mission "should be held together in tension and in fact were in early Pentecostalism."