Homogeneous Principle

I was reading Aubrey Malphurs this week (Planting Growing Churches for the 21st Century). He believes in the “homogeneous principle” for Churches -- that is, grouping people by culture -- a view that originated with Donald McGavran. He considers that e.g. young marrieds naturally group together, therefore ditto for cultural groups. But did he consider that e.g. young marrieds of different cultural groups might group together? Malphurs considers that it all comes down to the changes people are willing to make (or not) to their cultural "values", but that people resist such changes. And here, perhaps, lies the rub. It is values that separate. But the desire to worship -- the desire to minister to each other -- the desire to love -- unites. In my view, NON-homogeneity of various kinds is a litmus test of spiritual health in a Church.