The article presents a model of the formation process of new cooperati
ves, primarily based on studies of the Swedish organizational populati
on. The predominance of pragmatically oriented cooperatives provides a
n opportunity to study the process's organizational aspects, in relati
ve isolation from ideological factors and the impact of movements. Coo
perative formation is seen as an act of collective entrepreneurship, a
nd a key event in the process is the emergence and crystallization of
a social bearer for the cooperative project. A review of concrete case
s of cooperative formation points to the importance of a prior history
, and suggests four bases for the definition of a social bearer: commu
nity, need, idea and enterprise. The article closes with a review of t
he implications of the model for waves of cooperative formation, and f
or the cooperative's continued life path.