The concept behind the "10/40 Window" highlights these three elements (as of data available in 1990): an area of the world with great poverty and low quality of life, combined with lack of access to Christian resources and unreached non-Christians. The Window forms a band encompassing Saharan and Northern Africa, as well as almost all of Asia (West Asia, Central Asia, South Asia, East Asia and much of Southeast Asia). Roughly two-thirds of the world population lived in the 10/40 Window, and it is predominantly Muslim, Hindu, Buddhist, animist, Jewish, or atheist. Many governments in the 10/40 Window are officially or unofficially opposed to Christian work of any kind within their borders.