When a diplomat dies in the 1930s, he leaves behind a book of 'dream visions' he has been experiencing, detailing events that will occur on Earth for the next two hundred years.
 
This fictional 'account of the future' (similar to LAST AND FIRST MEN by Olaf Stapledon) proved prescient in many ways, as Wells predicts events such as the Second World War, the rise of chemical warfare and climate change.