Conclusion. Social science has contributed to some
understanding of the political, technological, and mili-
tary causes of particular wars. It provides psychological
props for the hope that it may help to kill that one
of the four horsemen which did the most social damage
in the first half of the twentieth century, or at least
that one which is most clearly social in origin. But
military science is so rooted in the particular actions
of individuals and groups in so wide a variety of par-
ticular circumstances that the history of ideas about
the causes of war and militarism remains one of new
combinations of old philosophical insights and ideas.
