For years, it’s been assumed that the biggest threat to Canadian unity comes from the province of Quebec. It hosted a separatist terrorist movement in the 1960s and is home to the sovereigntist Parti Québécois. It held two referenda on separation, the last of which saw the country hang together by less than one per cent of the vote. Today, the party tops the polls and is threatening to hold another referendum if it takes power next year.