Imagine a society in which you are rated by the government on your trustworthiness. Your “citizen score” follows you wherever you go. A high score allows you access to faster internet service or a fast-tracked visa to Europe. If you make political posts online without a permit, or question or contradict the government’s official narrative on current events, however, your score decreases. To calculate the score, private companies working with your government constantly trawl through vast amounts of your social media and online shopping data.

When you step outside your door, your actions in the physical world are also swept into the dragnet: The government gathers an enormous collection of information through the video cameras placed on your street and all over your city. If you commit a crime—or simply jaywalk—facial recognition algorithms will match video footage of your face to your photo in a national ID database. It won’t be long before the police show up at your door.

This society may seem dystopian, but it isn’t farfetched: It may be China in a few years. The country is racing to become the first to implement a pervasive system of algorithmic surveillance.