The Helliconia trilogy, by Brian W. Aldiss, is an epic microcosm of a story - a tale of civilizations trapped by circumstances and directed by forces larger and more implacable than any human construct - their environment. It reminds us that we're part of a larger fabric, that we have a place in our habitat, our planet, and the stars themselves.
I initially didn't see any value in picking this book apart as part of my
One Person Book Club (to contrast, the only previous book I've reviewed through this lens,
The Dispossessed, had several obviously relevant themes wrapped in a much less epic bow). I didn't see how it could relate to either sustainable cities or my time in Vietnam, but I'd heard it was considered a Masterwork, and (completed) sci-fi series are kind of my jam. So, what the hell. I gave it a shot. I'd been reading way too much news recently, anyway.
It wasn't until partially through the second book that I came to see the connections between the larger themes and how they related to my own interests. The enormous, detailed environmental canvas provides a cosmic level of context for the actions of the characters (a context that we humans can easily forget we're a part of), letting us see the natural, sociological, and psychic ramifications of a cataclysm that shook nature itself to the core.
The themes of natural change are all-important. The unusual phenomena which created this environment dominates everything in this story. The three stories detail the fallout of a solar system's disastrous encounter with a second star, which causes the climates, evolution, and civilizations of a planet to spin wildly out of control, colliding in fascinating and mind-expanding ways over the course of centuries and eons.