With a glance in the rearview mirror, ''Mirror, Mirror'' paints a broad and nuanced portrait of Canada since the 1970s. What has become of the country that Jean Chrétien touted as the "best" in the world? Have the great social struggles of half a century ago borne fruit? What do our families, our cities, and our daily lives look like today? More than just an illuminating overview of how life in Canada has evolved, this documentary is also an invitation to rethink a country we thought we knew.