In the period between the two world wars the social and human sciences
in South Africa became important contributors to the debates about vi
tal social issues, of which 'the Native question' was a particularly p
ressing one. Psychological knowledge, too, was utilized in the legitim
ation of a social order based on race, since the perception was that p
sychological testing produced empirical data which supported certain e
xplanations of this order. Two ideological positions developed in the
period under review in South Africa: eugenics and Christian-nationalis
m. The contribution of psychological testing, eugenics and Christian-n
ationalism to the construction of 'race' in the local context forms th
e focus of this paper. It is argued that eugenics provided arguments f
or social inequality in terms of biology, while its counterpart, Chris
tian-nationalism, provided similar arguments based on theology. Howeve
r, Christian-nationalism also enabled Afrikaner politicians and social
scientists to mobilize impoverished Afrikaans speakers, and hence it
had more of a policy impact than eugenics. Psychological testing becam
e recognized as a source of authority on social controversies, particu
larly with reference to educational policies, where race played a sign
ificant mediating role.