This article traces the origins of racial science in South Africa back
to the first half of the nineteenth century, Metropolitan racial theo
ry attracted a substantial following among white settlers in British c
olonies and the Cape was no exception. Local scientific thinking about
race focussed on phrenology, a popular science of character analysis
based on the configurations of the brain and skull, But phrenology had
differential appeal for British colonial intellectuals according to t
heir broader political affiliations. While humanitarian liberals were
critical of new-fangled theories of cerebral determinism that might co
ntradict their cherished belief in the immediate transformative powers
of religion and education, anti-liberal ideologues, and especially me
dical men, used the new racial science to buttress their hostile attit
udes towards Africans. The Xhosa Wars of the 1830s and 1840s proved a
particularly fertile terrain for sowing the seeds of scientific racism
. Frontier violence generated both African skulls, the raw empirical m
aterials that fuelled metropolitan racial science, and a hatred of the
Xhosa that made the settler population increasingly receptive to theo
ries of the innate inferiority of the African mind. This case study of
phrenology in the early nineteenth century Cape Colony therefore expl
ores the intersection of racial science with colonial politics, medici
ne and frontier violence.