Herbert Spencer was the most influential Anglophone sociologist of the
nineteenth century bur his contributions are now largely forgotten. I
t is argued, however that the clarity of his understanding of the use
of biological metaphors in sociology gives his work a power which is w
orth rediscovering. This proposition is pursued through a discussion o
f his treatment of the professions and their role in industrial societ
ies. His approach is compared with the ''ecological'' perspective of s
ociologists in the Chicago tradition, notably Andrew Abbott. It is sug
gested that Spencer's work rests on an alternative interpretation of t
he ecological model; this opens the way to an understanding of the reg
ulative structures of ''the system of the profession,'' which fills a
major gap in Abbott's account.