To a certain extent, this process is underway with the election of long-time leftist Jeremy Corbyn to head the British Labor Party.
In his speech at the Fete de la Rose this past summer, former Greek finance minister, Yanis Varoufakis, told the Socialist Party gathering that what the Left in Greece had done was to give Europeans "a sense that democracy can change things." Portugal was another step on that path, with Spain due up in December and Ireland in April.
(Note: You can view every article as one long page if you sign up as an Advocate Member, or higher).