All individual wills - that boils down to the primitive consent theory of unanimity.
The will which is directed towards the general good, ie is determined from the goal. The distinction between the particular and the general will is then equated with special and general interest. This general good is recognizable when people are just up - right. But how the general good can be recognized in practice, Rousseau does not solve this question. Esp. he does not claim: in parliament or by majority vote. These are later simplifications.