In this article, we review the history of the social scientific study
of leadership and the prevailing theories of leadership that enjoy emp
irical support. We demonstrate that the development of knowledge conce
rning leadership phenomena has been truly cumulative and that much is
currently known about leadership. We identify the contributions of the
trait, behavioral, contingency and neocharismatic paradigms and the r
esults of empirical research on prevailing theories. Issues that warra
nt research in each of the paradigms and theories are described, Ten a
dditional topics for further investigation are discussed and specific
recommendations are made with regard to future research on each of the
se topics.