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The Go-Betweens of the “Third Way”: Intermediaries and Mediators in the Transnational Circulation of Ideas A study of the circulation of New Labour ideas within the French socialist left produced two significant findings: on the one hand, it revealed the existence of “go-betweens”, secondary actors who, though less visible, play a crucial role; on the other hand, it showed that direct exchanges between the Socialist Party and New Labour were very limited in scope over the course of the period surveyed. “Supporting actors” thus prove to play a more important role than existing research on the subject would suggest and the “scenery” in which they act is not what one would have expected. On the basis of this empirical data, it is possible to rethink the concepts of “intermediarity” and mediation in complementary fashion so as to grasp both the active role played by these cosmopolitan go-betweens and the transformations that political ideas undergo when circulating abroad. ?