At the last meeting of the Montrose Amateur Radio Club, I gave a presentation on the history of ham radio. The notes I used, which provide a chronology of radio-related events for more than a century, may be found by clicking here. Other world events are also included to provide perspective.
These notes are compiled from many sources, including particularly the the ARRL’s Ham Radio History page, several Wikipedia articles, ham radio history compiled by Rod Dinkins, AC6V (SK) (he provides a list of many contributors), and the excellent and detailed history on the site of Thierry Lombry, ON4SKY.