You may have heard comments about “bounded sets” and “centered sets” in missions conversations. Since introduced by Paul Hiebert in 1978, these terms have been part of many missiological discussions. Frequently, in a somewhat reductionistic way, “bounded sets” are seen as Western and traditional and “centered sets” are seen as more progressive.

Let’s review what we are talking about. Bounded sets are defined by the boundaries used to describe the set. For instance, either conversion or baptism might be the boundary for a bounded set of the category “Christian.” According to this way of categorizing people, in order to be considered a Christian, you would have to have a conversion experience or be baptized. Often the list of characteristics that define a Christian are expanded to include things like: going to church regularly, not drinking alcohol, having assurance of salvation and espousing orthodox theology on all major doctrines.