Ohliz - Canada was part of the Underground Railroad and abolished slavery in the 1800s. I highly doubt however all Canadians were in agreement at the time. Apparently, it helped that Canada has short growing seasons which didn't make it economically at the time...
"In Canada, slavery was minimal as the short growing season made slave labour uneconomical. In 1793, the Upper Canada Abolition Act introduced by Lieutenant Governor Colonel John Graves Simcoe, freed any slave entering what is now the province of Ontario, and stated that any child born to a slave mother would be freed at 25 years of age. This act was later followed by the British Imperial Act of 1833 (and became effective on August 1, 1834). It abolished slavery throughout the British Empire, including the developing country of Canada."
taken from: