While it is always shocking when some new terrorist attack occurs in Canada it is, unfortunately, nothing new. Canada has suffered various forms of terrorism for over a century. Perhaps we haven’t been subject to as much terrorist violence as some other areas of the world, but it is a concern for Canadians as much as for anyone else. A clear-eyed review of terrorism in Canada need not be alarmist or inflame prejudices; it does need to be thorough, however, and include any groups that espouse violent means, whatever their ideological goals. In our two-part series, we will begin with a focus on domestic terrorism in Canada and those home-bred groups that have resorted to extremism and violent methods over the years to achieve whatever goals they may have believed in.