Academic epidemiology has failed to develop the scientific methods and
the knowledge base to support the fundamental public health mission o
f preventing disease and promoting health through organized community
efforts. As a basic science of public health, epidemiology should atte
mpt to understand health and disease from a community and ecologic per
spective as a consequence of how society is organized and behaves, wha
t impact social and economic forces have on disease incidence rates, a
nd what community actions will be effective in altering incidence rate
s. However, as taught in most textbooks and as widely practiced by aca
demicians, epidemiology has become a biomedical discipline focused on
the distribution and determinants of disease in groups of individuals
who happen to have some common characteristics, exposures, or diseases
. The ecology of human health has not been addressed, and the societal
context in which disease occurs has been either disregarded or delibe
rately abstracted from consideration. By essentially assuming that ris
k factors for disease in individuals can be summed to understand the c
auses of disease in populations, academic epidemiology has limited its
elf to a narrow biomedical perspective, thereby committing the biomedi
cal fallacy of inferring that disease in populations can be understood
by studying risk factors for disease in individuals. Epidemiology sho
uld be redefined as a study of the distribution and societal determina
nts of the health status of populations. This definition provides a st
ronger link to the primary mission of public health and places an appr
opriate emphasis on the social, economic, environmental, and cultural
determinants of population health. Epidemiology must cross the boundar
ies of other population sciences and add to its scope a macro-epidemio
logy, a study of causes from a truly population perspective, consideri
ng health and disease within the context of the total human environmen
t.