Perhaps the most important piece of hypothetical technology in the film is the so-called "Thinking Machine," created by Frank Walker's nefarious counterpart, the brilliant scientist David Nix, played by Hugh Laurie. The machine acts as a giant antenna for broadcasting pessimistic thoughts into the minds of humanity, in the hopes of averting global disaster. But it backfires, and these negative thoughts about the future become a self-fulfilling prophecy. As the film's not-so-subtle message makes clear, the only thing that can save humanity from disaster is the power of positive thinking.
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