Sub-state nationalist parties of the industrialised West occupy different positions along the left-right political spectrum. Despite the similarities of their political agendas, these parties adopt different ideological identities. This paper seeks to explain the choice of party position and the long-term consistency of these positions by employing a path-dependent perspective. The focus is first, on the critical junctures during which such choices are made; and second, on the mechanisms of continuity ensuring the persistence of the left-right identities. The argument is explored within the empirical context of Que´be´cois nationalism.