This article outlines the ways that religious schools, hospitals, and socia
l service institutions have affected their sponsoring denomination or churc
h group in the past. Three basic channels of influence are described. The i
nstitutions impacted the sponsor's very identity and purpose, they defined
the requisites of holy activity, and they served as a channel for membershi
p recruitment and leadership development. Implications far denominations an
d other religious groups of the current attenuation of ties with their form
er institutions are then explored.