What is the 10/40 Window?
The 10/40 Window is the rectangular area of North Africa, the Middle East and Asia approximately between 10 degrees north and 40 degrees north latitude. The 10/40 Window is often called "The Resistant Belt" and includes the majority of the world's Muslims, Hindus, and Buddhists. The original 10/40 Window included only countries with at least 50% of their land mass within 10 and 40 degrees north latitude. The revised 10/40 Window includes several additional countries, such as Indonesia, that are close to 10 or 40 degrees north latitude and have high concentrations of unreached peoples. See the original and revised country lists on this page. Approximately 4.75 billion individuals residing in an estimated 8,448 distinct people groups are in the revised 10/40 Window. 5,924 (62.5 %) of these people groups are considered unreached and have a population of 2.91 billion (61.3 %). The 10/40 Window is home to some of the largest unreached people groups in the world such as the Shaikh, Yadava, Turks, Moroccan Arabs, Pashtun, Jat and Burmese. The 10/40 Window is home to some of the largest unreached people groups in the world. The 10/40 Window has several important considerations: first, the historical and Biblical significance; second, the least evangelized countries; third, the unreached people groups and cities; fourth, the dominance of three religious blocs; fifth, the preponderance of the poor; sixth, the strongholds of Satan within the 10/40 Window.
The 10/40 Window: Historical and Biblical Significance The first and most fundamental reason why followers of Jesus Christ ought to focus on the 10/40 Window is because of the Biblical and historical significance of this area. The Bible begins with the account of Adam and Eve placed by God in the heart of what is now the 10/40 Window. God's plan, expressed in Genesis 1:26, was that mankind should have dominion over the earth, subduing it fully. However, Adam and Eve sinned against God and forfeited their right to rule. Man's sinful behavior increased until God intervened and judged the earth with a cataclysmic flood. Then came man's futile attempt to establish new dominion in the building of the great Tower of Babel. That effort, which also occurred in the heart of the 10/40 Window, was an open defiance against God. Once again, God reached forth His hand in judgment. The result was the introduction of different languages, the scattering of earth's people, and the formation of nations. The 10/40 Window is home to the majority of the world's unevangelized countries. The 10/40 Window: The Least Evangelized Countries The 10/40 Window is home to the majority of the world's unevangelized countries. The "unevangelized" are people who have a minimal knowledge of the gospel, but have no valid opportunity to respond to it. While it constitutes only one-third of earth's total land area, nearly two-thirds of the world's people reside in the 10/40 Window. The original 10/40 Window included only countries with at least 50% of their land mass within 10 and 40 degrees north latitude. The revised 10/40 Window removes several Christianized countries such as South Korea and the Philippines and includes several additional countries, such as Indonesia, that are close to 10 or 40 degrees north latitude and have high concentrations of unreached peoples. See the original and revised country lists. These lists include both sovereign states and non-sovereign dependencies. The 10/40 Window: The Unreached Peoples and Cities An estimated 2.91 billion individuals live in approximately 5,924 unreached people groups are in the 10/40 Window. The 10/40 Window also contains the largest unreached peoples over one million. In addition, the 10/40 Window contains the overwhelming majority of the world's least evangelized megacities -- that is those with a population of more than one million. The top 50 least evangelized megacities are all in the 10/40 Window! That fact alone underscores the need for prioritizing 10/40 Window Great Commission efforts.