10/40 Window, 4/14 Window, 40/70 Window

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Do you know about the 10/40 Window, or the 4/14 Window, or the 40/70 Window? These terms are all related to missionary work in the Eastern Hemisphere.

definition of 10/40 WindowThese three windows have a lot in common. They all refer to combinations of numbers, and they all have to do with missionary work. Now here’s where they differ. The 10/40 Window and the 40/70 Window refer to latitudes on a world map, specifically that part of the world that is in the Eastern Hemisphere. The 4/14 Window, on the other hand, refers to the age range of 4 years old through 14 years old, a range that research shows is when most people will make some kind of conversion to Christianity. So the 10/40 Window and 40/70 Window are about where missionaries should go, and the 4/14 Window is about whom missionaries should focus on.

The term 10/40 Window was coined by Luis Bush, a missionary, around the year 1989 to refer to an area that many missionaries already recognized as a particularly difficult area for mission work and evangelism. Before the more neutral term 10/40 Window was used, that region of the world was sometimes referred to as the Resistant Belt in reference to the extreme difficulty that missionaries had in achieving any kind of evangelistic success. I suppose you could say that the Resistant Belt was the opposite of the Bible belt. During the 1990s, hundreds of thousands of Christians made an effort to pray for the non-believers in this region of the world. Saying prayers specifically for the people in that region became known as praying through the window. The idea was that even if you couldn’t get to the other side of the world to do mission work, and even if some of those countries over there were slamming the doors shut at the border to the missionaries who did go, you could still send your blessings to those countries “through the window,” so to speak, through the power of prayer. Tight borders and secret police can’t stop the power of prayer!

(Other geography terms used by missionaries include Two-Thirds World, Three-Fourths World, and majority world.)

Now, fast forward a decade. A new generation of missionaries and missiologists (which are people who study mission work and missionary techniques) have come to realize that there is another important area of the world that needs more missionary work: Western and Northern Europe and the parts of Central Asia that lie to the north of the 10/40 Window. In keeping with the pattern of defining a “window” by the latitudes, this new region has been named the 40/70 Window. These two regions are not just different geographically; whereas the people in the 10/40 Window have oftentimes never even heard of Jesus or the Bible, the people in the 40/70 Window are usually familiar with Jesus, the Bible, and Christianity—they just don’t believe that the gospel is factual, or else their belief is a superficial and cultural one rather than a deeply held personal conviction.

So much for those two windows. What about the third one? The 4/14 Window is a horse of another color, to mix up my metaphors. This window isn’t so much a place on the planet as it is a population demographic. Researchers discovered that adult Christians usually became Christians during their childhood. And so this research suggests that rather than focus on people of all ages in a geographic region, maybe missionaries should focus on the young people, aged 4 to 14, in that region.

Have a look at the complete definitions for all three of these terms below.


10/40 window n. Construed with the. Missions The rectangular geographical region between 10 and 40 degrees north latitude extending from the west coast of Africa to the eastern tip of southeast Asia, a region that is alleged to contain 60 of the least evangelized countries of the world.
This region of the world was formerly known as the *Resistant Belt owing to the difficulty in making converts in this part of the world and, in some cases, the difficulty of even entering some of these countries in order to conduct mission work.
Luis Bush is credited with coining the term; he used it in an address he gave in July 1989 at the Lausanne II missions conference in Manila (see 1989 cite).
See also *ia’s; *stans.
1989 Bush “The 10/40 Window: Getting to the Core of the Core” (1990) : The core of the unreached people of our world live in a rectangular-shaped window! Often called “The Resistant Belt,” the window extends from West Africa to East Asia, from ten degrees north to forty degrees north of the equator. This specific region, which has increasingly become known as The 10/40 Window, encompasses the majority of the world’s Muslims, Hindus, and Buddhists—billions of spiritually impoverished souls. As we approach the end of this millennium, it is imperative that our evangelistic efforts be focused among the people who inhabit The 10/40 Window. If we are serious in our commitment to provide a valid opportunity for every person to experience the truth and saving power of Jesus Christ, we cannot ignore the compelling realities within this region. 1992 Winter, Hawthorne Perspectives on the World Christian Movement 151 : The heart of Islam and most of its followers live in the part of Africa and Asia known as the 10-40 window. 1996 Johnstone The Unreached Peoples 12 : Teams from 32 nations actually visited the 10/40 Window countries to pray on-site in what have been called prayer journeys. 1999 Charisma and Christian Life XXIV. iss. 6–11 50 : A team of intercessors led by Every Home for Christ president Dick Eastman recently made a quiet prayer journey into the highly restricted Buddhist kingdom of Bhutan, in the heart of the 10/40 Window. 2002 Byerly Miracles Happen When Women Pray: Eyewitness Stories That Will Encourage You 124 : During the 1990s, there was intense prayer focused on behalf of the 65 nations located in the 10/40 Window (so named because of its latitude and longitude location on the globe). 2005 Melton Encyc. of Protestantism 238 : Much of the region falls within what modern Evangelicals call the 10/40 Window, which includes the most unevangelized nations of the world.
pray through the 10/40 Window To pray for the people who live in the *10/40 Window, specifically to pray that they will convert to Christianity.
1993 Women of Prayer 181 : Aglow’s first world prayer map, created in 1993, emphasizes praying through the “10/40 window.” Islam, Buddhism, and Hinduism, the three major religious blocs in the world are within countries that lie between the 10th and 40th degrees north of the equator, or the “10/40 window.” 1995 Runyon Ferguson: Her Tractor 106 : I asked an older lady in my WMI group if Free Methodists “pray through the 10/40 window.” 1996 Walters The Anointing and You 94 : C. Peter Wagner has a vision to raise up over two million children to pray through the 10-40 window. 1996 Johnson Catch the Wave 23 : They “prayed through the 10/40 Window,” asking God to make himself real to the people of 100 key “Gateway” cities around the world. 1999 Woodberry in Bush The Move of the Holy Spirit in the 10/40 Window 5 : As Daniel prayed through his window toward Jerusalem and God answered, so this book encourages us to pray through the 10/40 Window that God might answer. 2010 Goode Which None Can Shut: Remarkable True Stories of God’s Miraculous 000 : Window International Network (WIN) claims to have helped some 40 million Christian believers in 120 countries pray through the 10/40 Window, where the world’s most unreached people live.
40/70 Window n. Construed with the. [By analogy with *10/40 Window] Missions The geographical region between 40 and 70 degrees north latitude extending from the west coast of Europe to central Asia, a region that is alleged to contain a mixture of people who have not been evangelized as well as people who have been evangelized but have not converted.
2000 Sheets Watchman Prayer 39 : As Turkey and Ephesus are included in both the 10/40 Window and the 40/70 Window, Turkey appears to be the principal hinge nation for this area of the world. 2000 Charisma and Christian Life XXV. iss. 6–11 178 : C. Peter Wagner, a recognized expert on prayer and world evangelization, says the time has come to shift attention from the so-called 10/40 Window to the new 40/70 Window. He believes the focus needs to switch from countries where people have never heard of Christ to nations where many have heard but have not been given the “true gospel,” Wagner says. His 40/70 Window includes Europe and North and Central Asia. 2001 wmpl.org (1 Aug.) : Some speak, too, of a “forty-seventy window” containing nominal Europe and unreached Central Asia. 2006 Shaw Waking the Giant: The Resurging Student Mission Movement 80 : Those born in the 10/40 window and some places in the 40/70 window (primarily Western Europe) could conceivably live their entire lives with no viable access to the gospel message. 2011 Wentroble Praying with Authority: How to Release the Authority of Heaven 123 : We were there to seek the Lord’s strategy for releasing revival in the unevangelized area that extends from Iceland through Europe into Central Asia (often called the 40/70 window).
pray through the 40/70 Window To pray for the people who live in the *40/70 Window, specifically to pray that they will convert to Christianity.
2010 Wagner Wrestling with Alligators, Prophets, and Theologians 201,245 : This time we would no longer be praying through the 10/40 Window, but rather we would pray through the 40/70 Window…. Hundreds and hundreds flew into Italy to be with us in the finale of praying through the 40/70 Window.
4/14 Window n. Construed with the. [By analogy with *10/40 Window] Missions The population group of children worldwide between the ages of 4 and 14 years old, or a geographical region whose population is largely made up of such children; children in this age range are alleged to be an important demographic group to be evangelized.
Dan Brewster is credited with coining this term (see 1996 cite).
See also *ten-forty window.
1996 Brewster “The 4/14 Window: Child Ministries and Mission Strategy” in Kilbourn Children in Crisis: A New Commitment : Another window, within the [10/40] window, however, may be just as significant…. I call that window the 4/14 window…. In the USA, nearly 85 percent of people who make a decision for Christ, do so between the ages of 4 and 14. 2000 Bush “An Overview of the Unfinished Task” Mission Frontiers (Sep./Oct.) : Since between 60 and 80 percent of people who make a decision for Christ, do so between the ages of 4 and 14, the 4/14 window deserves more prominence in our global evangelism strategies. 2003 Hoskins Affect Destiny 93 : It will reach those too young to read and everyone in the vital 4/14 Window. Young children respond to the color, motion and sound of character-generated productions, and they will love watching the life of Christ unfold on TV. 2003 Johnson Teacher Training on the Go 33 : It has been called the 4/14 Window (a comparison to the 10/40 Window where 40 percent of the world’s unreached people live…. The 4/14 Window is the period between the ages of four and fourteen when 60 percent of Christians come to a saving faith. 2005 Pocock et al. The Changing Face of World Missions 15 : 4/14 Window: Developed as a spin-off of the term 10/40 Window, this refers to the ages in which children are most likely to commit their lives to Christ as well as the ages in which they are most vulnerable. 2008 Wright The Christian Travel Planner 189 : The 4/14 Window refers not to latitudes but to the ages (four to fourteen years) when children are most receptive to faith and hearing the message of Jesus. In other words, this is the window of opportunity to evangelize children.
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