One of the things Insurgent makes harder to ignore than Divergent ever did is this: the faction system is not just restrictive – it is actively violent.

Not always in loud, obvious ways. Not only through executions or faction wars. But through the constant, grinding demand that people reduce themselves to a single acceptable version of who they are, and then perform that version perfectly or suffer the consequences.

The series’ language insists this is about choice. You choose a faction. You decide where you belong. But Insurgent exposes how hollow that promise really is.

Because a choice made under threat is not a choice. It’s compliance.

From the moment someone fails to fit cleanly into a faction, the system closes around them. Be factionless, be invisible. Be insufficiently Abnegation, insufficiently Dauntless, insufficiently Erudite – and your value drops instantly. Identity isn’t something you explore or grow into; it’s something you must prove, again and again, under surveillance.

What Insurgent does particularly well is show how exhausting that is.

This isn’t a world where people are allowed to be contradictory, or messy, or unfinished. You are brave, selfless, intelligent, or honest. Any overlap is dangerous. Any ambiguity is suspicious. And Divergence isn’t terrifying because it’s powerful – it’s terrifying because it exposes the lie at the heart of the system: that people can never be reduced to one thing.

In that sense, Divergents aren’t rebels by choice. They are problems simply by existing.

What complicates this further is that the narrative itself sometimes seems torn between critiquing the system and reproducing its logic. Even as Insurgent condemns faction rigidity, it still relies on exceptional individuals – people who are more than others – to drive change. The system is wrong, yes, but it’s still the special, resilient, unusually capable people who are allowed to survive it.

That tension sits at the heart of the book for me. Is Insurgent asking us to imagine a world beyond rigid categorisation or is it reinforcing the idea that only certain kinds of people can transcend it?

Tris’s journey embodies that conflict. Her struggle isn’t just external; it’s internalised faction pressure. She has absorbed the idea that worth must be proven through suffering, that identity must be earned through pain, that choosing wrongly deserves punishment. The system doesn’t just control bodies, it reshapes how people think about themselves.

By the time Insurgent reaches its midpoint, the cost of choice is everywhere. Choice fractures alliances. Choice isolates. Choice becomes something characters are punished for making and for refusing to make. The novel becomes less about freedom and more about endurance: how long can someone survive being forced into shapes that don’t fit?

Reading it now, that feels like the book’s most interesting legacy.

Not the action, or the twists, or the escalating rebellion – but the quiet insistence that systems which demand singular identities will always break the people inside them. Even – maybe especially – the ones who appear to choose them freely.