Twilight World As Future History?

I am beginning to suspect that Poul Anderson's Twilight World (London, 1984) is not only a series packaged as a novel but also potentially a short future history:

Prologue, 1-5 (30 pages);
"Chain of Logic," 1-5 (30 pages);
"The Children of Fortune," 1-18 (101 pages);
Epilogue (4 pages).

In the Prologue, Hugh Drummond, having just completed an exploratory flight around the world after it was devastated by the nuclear and bacteriological Final War, conducts a census of what is left of the United States, highlighting that mutants are now a permanent part of the population and will become the majority.

"Chain of Logic" 1, narrated from the viewpoint of Roderick Wayne in the small town of Southvale, reveals that, nine years earlier, the US and Canada were united and Drummond was elected President.

"Chain of Logic" 2 shows Richard Hammer leading his gang towards Southvale, intending to capture the town, hijack a plane, fly to the capitol and destroy it with one of its own stockpiled atomic bombs, thus destroying the government which otherwise would put an end to his rule in Southvale.

"Chain of Logic" 3, which is as far as I have reread, begins when Wayne's mutant son, Alaric, is woken by his equally mutant dog trying to warn him about a threat from the south - Hammer's gang.

"The Children of Fortune," set later, covers the resumption of interplanetary travel, as far as Mars, but it features Alaric Wayne, not a later generation, which is why I describe the series as only potentially a future history. However, the Epilogue is set millennia later when Homo Superior with telepathic communication and individual lifespans of centuries inhabits the rich green planet Mars and is terraforming Ganymede so the future historical perspective is definitely present.