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Is it convoluted, perhaps as a result of adhering too closely to the novel it’s based on? Maybe. Is the world it posits perhaps implausible? Could be. So what? The same applies to the Harry Potter movies and the Hunger Games flicks. The essential thing about Insurgent is that it gets all the important stuff right. The really clever thing about Insurgent that elevates it a step above the first film is that it sneakily undercuts a lot of the tropes of what’s become a subgenre: the young-adult hero’s journey.

Offering us a gal protagonist is the least of this series’ novelty, although that’s still a Hollywood rarity. There’s almost nothing here that boys can’t identify with in the exploits of Tris Prior (Shailene Woodley) in her dystopian future sci-fi world. Boys should be able to recognize Tris’ difficulties in fitting in to a societal system that divides people up into Factions by temperament and talent, but which doesn’t recognize that no person can be so easily defined as, say, nothing but brutally honest like members of the Candor caste, who work as lawyers, or always hippie-happy like members of the Amity caste, who work as farmers or artists. Tris doesn’t fit in because she is a special case called Divergent, showing aptitude for all the Factions (which also include brainy Erudite, brave Dauntless, and selfless Abnegation). Don’t we all bristle at attempts to shove us into one confining box? That’s a discontent that knows no gender bounds.

In Divergent, the Faction system, despite all its inherent unlikeliness, worked as a metaphor, on an individual level, for adolescent “no one understands me!” rebellion. Now, in Insurgent, it balloons up into something much larger and much more culturally encompassing: as dangerous tribalism that threatens peace and prosperity even as political leaders call, with unintended irony, for tribalism to protect peace and prosperity. The plot here revolves around a mysterious artifact that ruthless Jeanine (Kate Winslet), leader of Erudite, believes holds “a message from the Founders that will ensure the future we deserve.” Jeanine wants to “eradicate the Divergent crisis,” which she keeps saying is going to ruin the little oasis of civilization they cling to in a ravaged world, yet only a Divergent can open the box, which requires passing a test attuned to each Factional temperament.

Things get really dark along the way, and more brutal than YA stories usually get, as fugitive Tris and her friends alternately run from Jeanine’s Dauntless thugs and then run right into the hornet’s nest for reasons that do get overly complicated, but fine. Because of course Tris is the Divergent that Jeanine needs, and as Tris’ specialness comes to the fore – no spoilers! – it is accompanied by another busting of clichés: The power to affect real change in the world isn’t the result of anything fantastical, like the Force, but arises from our full, cross-Factional humanity. Which means that it is a power that is within all of us, no midichlorians or magical parentage required.

New director Robert Schwentke continues the series’ ethos of not looking like other SF dystopias we’ve seen, with its interesting and probably fairly future-realistic urban ruin punctuated by blips of high-tech reclamation, and with its mix of people: Women exist as full participants in this culture, doing all sorts of jobs and holding all sorts of positions of power (such as the Amity leader played by Octavia Spencer, and the Factionless leader played by Naomi Watts), and not everyone is white. Nothing we see in this movie should feel as radical as it does. In a more adventurous movie environment, Insurgent wouldn’t feel this fresh. But this is where we are now. It’s kind of where Tris’ world is. That’s not good for us.

INSURGENT (3) Directed by Robert Schwentke • Starring Shailene Woodley, Ansel Elgort, Kate Winslet, Mekhi Phifer • Rated PG-13 • 119 mins. • At Maya Cinemas, Century Cinemas Del Monte, Northridge Cinemas, Lighthouse Cinemas.