 These topics have been chosen for the light their investigation throws on the Circle’s own agendas and the reception of its doctrines amongst philosophers at large, as well as for the relative ease with which their discussion allows its development and legacy to be charted. There can be little doubt about the enormous impact that the members of the Vienna Circle had on the development of twentieth-century philosophy. What is less clear is whether any of its distinctive doctrines are left standing once the dust of their discussion has settled or whether those of its teachings that were deemed defensible merged seamlessly into the broad church that analytic philosophy has become (and, if so, what those surviving doctrines and teachings may be).