One key theme in the words sent in from around the world has been that of inspiration: fans who have felt driven and empowered to follow their dreams by Sir Alex.
Across every continent, there are thousands of people - and not only Manchester United supporters - who follow the value system which Sir Alex instilled at United and dictated his management.
The Govan-born boss has regularly outlined his belief that success comes when everyone at the club’s role is viewed equally. He had a fantastic ability as manager to create an environment in which such a belief was followed by all.