Communication · 1840
Uniform Penny Post
One cheap prepaid stamp sends a letter anywhere in Britain.
Rowland Hill's reform, launched with the Penny Black stamp in May 1840, replaced distance-based fees paid by recipients with a flat prepaid penny. British letters more than doubled within two years, and nearly every country adopted stamps; the Universal Postal Union followed in 1874.
What it built on 2
Related measurements
The dashed line marks when it first worked.
Letters and parcels handled in the UK Latest: 16.7B items per year (1993) Source: Our World in Data
Literacy rate, England/UK since 1475 Latest: 98.5 % (1950) Source: Our World in Data