Throughout the 20th century, managers and policy makers have relied on
psychological interventions to help solve organizational problems. Ye
t, the results of these interventions rarely meet expectations. One re
ason may be that some of the perspectives used in thinking about inter
ventions are at odds with how interventions and organizations function
. This article argues that applied psychologists may benefit from an e
volutionary perspective. Although it holds an important place in basic
psychology and organization theory, an evolutionary perspective is ne
arly absent in applied psychology. It views the development and use of
social technologies as part of sociocultural evolution-driven by vari
ation, selection, and retention. This article provides a framework for
theory and research on an evolutionary perspective in applied psychol
ogy and suggests implications for practice. Key concepts in the design
of interventions include uncertainty variation. and conflict.