Divide et impera. Divide and rule: the approach of choice for many historical conquerors, and also a great way to write a novel.
Breaking apart something that was once whole to examine the pieces provides the novelist with an approach fit for a whole range of subjects. I’ve found so many books following that pattern that I couldn’t begin to list them all. But the good news is that I’ve only been asked to talk about five here, so I’ve picked five that have lodged themselves in my brain, and showcase in how many ways the tactic can be used when it comes to the best science fiction and fantasy writing.