If ya google

Slavery in Canada

you will find two Wiki articles that are accurate. Remember that slavery was not stopped by the British until the very early 1800s (1807?). It seems abhorant to any thinkiong person these days, but it was just a fact of life in the 1700s and earlier. These days, slavery if in an economic form, and that is an insidious form of it. Not much has changed in that regard. imo