I'll do Canada.
1896: Tories lose their dominance in Quebec over the French schools question.
1921: The Progressive party places 2nd in response to Western alienation over tarrifs, government aid etc.. Two-party system is gone forever.
1935: Social Credit and the CCF emerge as socon and socialist responses to the Great Depression.
1958, 1962: Social Credit begins winning seats in Quebec. The Western/Anglo Socreds replaced by the Tories. The NDP contests their first election in 1962.
1984: Mulroney wins a landslide with a broad base including Western populists, Eastern establishment types and Quebec nationalists
1993: Mulroney coalition implodes as populist and French nationalist wings become Reform and Bloc Quebecois respectively.
2004: Progressive Conservatives and Reform merge. NDP shut out of Sasketchewan indicating that their prairie roots are waning.
2011: NDP sweeps Quebec. Liberal coalition cut down to trendy urban areas, English Montreal, and parts of Atlantic Canada.
I consider Canadian politics to be the most interesting in the Anglosphere.
The most important election in Canadian history was 1968. That was the point Canada went from being a major world player to an appeaser of communists and terrorists. From a english/scots/french nation to a multicultural tower of babbel. From an economic powerhouse to an economic basketcase. In 1968, Canadians decided they didnt want to be a worldpower anymore.
1993 was important because the Liberals, free from fear of losing an election, began to roll back disasterous Trudeau-nomics. Cutting spending, cutting taxes and taking a more free market approach.
