That said, Waterworld isn’t nearly as good as the only marginally successful Mad Max mostly because of there are far too many holes in the logic of the film. Firstly, the Deacon (Dennis Hopper in full Apocalypse Now crazy mode) and his “smokers” use the Exxon Valdez oil tanker as their base and the place from which they get the gas for their jet-skis, cars and airplanes. Leaving aside the fact that the Exxon Valdez is no longer called the Valdez and is still in use, the idea that these guys could refine the crude oil on the tanker into the high octane gas they would need for their vehicles is ridiculous. So is the idea that they could learn to fly an airplane and that they could fix anything that goes wrong with it. (And that’s not even mentioning the fact that, somewhere along the line, that plane would have been forced to make an emergency landing and would thus be lost to the sea.) But more importantly, if they had all this equipment and knowledge, why did they lose all history of what happened to the world? They can fly planes but don’t remember what happened to the world?
And then there’s the fact that Costner’s Mariner has a mutation that allows him to breathe underwater. But no one else has a similar mutation or any mutation of any kind. That’s a ridiculous misunderstanding of how evolution works and is a distraction throughout the film (the idea that two gills behind his ears would allow him to breath underwater for any length of time is also suitably laughable).
There’s also a couple other admittedly minor issues that nonetheless distracted me. One is that paper is a highly valued commodity. Why? What use is paper to people that are adrift on the sea? Another is that there are no people on Dryland when the characters in the film finally get there. Really? No one has found this place ever? And at the end of the film, the Deacon has his troops start rowing the Exxon Valdez. There is no way that even ten thousand people rowing in unison could hope to move something as massive as that. Oh, and if the polar ices caps completely melted, sea level would rise a couple hundred feet not the four or five miles required to submerge the entire world.
On the other hand, the film does have a couple moments of intelligence (possibly owing to Joss Whedon’s seven weeks working on the script (seven weeks he described as “hell”)). The most interesting among them being the moment when Mariner and his love interest discuss whether Dryland really exists. The love interest thinks that it does because humans are uneasy at sea. We have hands and feet instead of fins and flippers. That’s an unexpectedly intelligent way to look at things.
