The organisation arises as product of the struggle … organisations … are … born from the mass strike … from the whirlwind and the storm, out of the fire and glow of the mass strike and the street fighting rise again, like Venus from the foam, fresh, young, powerful, buoyant trade unions. … In the midst of the struggle the work of organisation is being more widely extended.

Class struggle, which is itself structurally limited and selected by various social structures, simultaneously reshapes those structures. … Class struggle is intrinsically a process of transformation of structures, and thus the very process which sets limits on class struggle is at the same time transformed by the struggles so limited. … Organizational capacities are objects of class struggle. … The organizational capacity of the working class to engage in struggle is itself transformed by class struggle.

In history, as elsewhere, the causes cannot be assumed. They are to be looked for.