Emily St. James, Episodes:

The comfort in Zodiac is the comfort of doomerism, the idea that we are completely fucked, and it’s better to just admit it. The only people who matter are the monsters in the shadows who’ve broken the world and the people sitting right in front of you, who might be able to help you shine what meager light you possess into those shadows.

[…]

The kind of light dehumanization that peppers the edges of Zodiac’s frames is something we all practice from time to time. When you are engaged in a really intense conversation in a restaurant, the server might become an abstraction to you. You’re aware they’re there, but you’re also really locked in on what you and your friend are chatting about. This filtering of the world is normal, even healthy. Our brains have to shut out some information to make sense of what’s important to us in that moment.

Yet watch Zodiac again with an eye toward how Fincher utilizes this technique. The longer the movie goes on, the more other people only seem to exist as disconnected blobs in the background somewhere. The second you start to really look at them, you might start to think they mean to do something horrible to you. So you learn not to see them, and the world becomes a collection of scary stories waiting to happen.