A letter from five Alberta women that legally redefined who a “person” is. A correspondence that created the century-old iron ring tradition bringing in engineering standards. Before social media campaigns, these pivotal moments in Canadian history started with a piece of paper, a pen and a goal.

But the glory days of letter-writing have passed. Canada Post now delivers an average of two billion letters a year — down from 5.5 billion 20 years ago, marking a sharp decline in letter door deliveries (even if most are not personal letters). And the postal service is in talks to end home mail delivery. Canadian postal workers moved from a nationwide walkout to a rotating strike on Oct. 9, protesting the federal government’s decision to restructure the Crown corporation while mail delivery resumes.

The Persons Case letter

The iron ring correspondence

Viola Desmond’s pardon

In Flanders Fields

The Japanese Canadian Redress Letter

The discovery of insulin

Blueprint for a country