  This paper summarizes Geant4 contribution to scientific research over the
past 25 years through a scientometric analysis of the results with which it has
been associated. The scientometric data collected from scholarly literature and
databases are evaluated with methods pertaining to econometrics and ecology to
quantify relevant traits, diversity and disparity in their scientific and
geographic distributions, and to identify statistically significant trends. The
analysis reviews the contribution of Geant4 to the field - experimental
particle physics - that originally motivated its development and highlights its
role in other research domains including nuclear physics and engineering,
astrophysics and space science, biomedical physics, archaeology and the
cultural heritage.
