We analyzed psychiatric and criminological data from 103 arsonists. Th
e following criticisms of the definition of pyromania according to DSM
-III-R and IDC-10 seem appropriate. First, the categoric exclusion of
aggressive motives does not seem very promising, since approximately o
ne fourth of arsonists whose firesetting is based on motives quoted in
DSM-III-R may also have an aggressive motive. Second, ICD-10 gives be
ing drunk and alcoholism as a criterion for the exclusion of pyromania
. This seems untenable, since the behavior classed as pyromania is lar
gely a product of alcohol misuse. Repeated firesetting, resulting from
being fascinated by fire etc., may be less a disturbance of impulse c
ontrol but rather the manifestation of a psychoinfantilism, which, sup
ported by alcohol abuse, extends into older age. The mean age of such
arsonists is slightly above 20 years. The tendency for relapses after
imprisonment seems to be low; this tendency probably decreases spontan
eously in older age. The mean age of arsonists with aggressive motives
is a Little below 30 years, those setting fire with suicidal motives
have a mean age of 35, deluded arsonists have a mean age of 40 years.
Concrete sexual motives are relatively ran. Approximately 50 % of arso
nists have a purely aggressive motive. Retaliation is a rare cause, ho
wever, since most of them do not even know the victims. One third of t
hese persons set the fire in their own homes. Most arsonists show a pe
rsonality disorder, with insecurity and narcissism predominating. Data
on firesetting are to be treated with caution, since two thirds of al
l cases are newer resolved; one fourth of cases concern miners, and in
Central Europe arsonists with rational motives are hardly ever referr
ed to psychiatrists.