It was another German missiologist, Georg F. Vicedom, who has the honour of having developed the concept of missio Dei in a way that seems to be consistent with the more classical missiology that preceded Willingen, and quite different from the more radical missiology that, under the same label, was worked out during the 1960s. (christianitytoday.com)
The concept of missio Dei is not free from difficulties. (religion-online.org)
But, let me breifly explain why some evangelicals are concerned about the word missional and its roots in missio dei theology. (christianitytoday.com)