What provinces did not join confederation in 1867 why?

In 1867, the provinces that did not join Confederation were British Columbia, Prince Edward Island, Newfoundland, and the Northwest Territories. British Columbia was concerned about its geographical isolation and the lack of infrastructure, while Prince Edward Island hesitated due to financial concerns and the potential loss of its autonomy. Newfoundland opted out for similar reasons, preferring to maintain its independence and economic control. The Northwest Territories, largely unsettled and sparsely populated, were not yet ready for self-governance or inclusion in Confederation.