I love this short quote which illustrates an important point.
Recently a number of voices have been raised complaining of what they perceive to be a switch in resources from traditional mission societies to the new social ministries. There is indeed a worrying decline of missionary interest in many evangelical churches and a fall-off in giving to missionary societies. Not all, however, are convinced that this is due to the rise in social concern, not least because most missionary societies have traditionally also been involved in social ministries. For many the greater concern is that over 90% of traditional mission work is directed towards areas where there are already established churches. This leaves much to be done among the 40% of the world’s population who are as yet unreached by the gospel.
From Awakening to a World of Need by Tim Chester and John Stott.