I do not know how, but Disney made a fantastic cartoon mystery about gender, race and law enforcement. Oh, wait, I do know. They made it about animals instead of people, they did an amazing job of fantasy world-building, they got all the plot points in place, and they somehow made the theme explicit without—in my opinion—letting it get sickeningly didactic.
Premise: In a world where anthropomorphic mammals live together in harmony regardless of whether they are predators or prey, a bunny from a carrot-farming family becomes the first bunny police officer in the big city. Her victory turns to ashes when she’s merely made a meter-maid and tricked by a fox who’s as sly as a—well, as a fox. Meanwhile, fourteen mammals have disappeared in the city and no one knows why.
Zootopia is another full-on American movie about freedom of choice, but in this case the “be anything you want” message is tempered with uncannily realistic reminders that nobody—and no melting-pot, not even one with a utopian reputation—is perfect and that people will surprise you in both good and bad ways.
SPOILERS BELOW, including a detailed plot summary in the form of a beat sheet in the style described in Blake Snyder’s Save the Cat.