In this paper, we build on a detailed case study and the theories of evolut
ion in social and cultural systems and interorganizational ecology to devel
op a model of strategy as guided evolution. Its primary distinctions from e
arlier models of organizational and intraorganizational ecology lie in (i)
the incorporation of an important-yet realistic-role of top management in s
haping the direction and outcomes of the evolutionary processes within firm
s, and (ii) the incorporation of human and social capital as a critical uni
t of selection within such processes. We describe the model and discuss the
evolutionary and ecological processes associated with it. Copyright (C) 20
00 John Wiley & Sons, Ltd.