There has never been a bright line between word and deed. Yet for years, the founders of Facebook and Twitter and 4chan and Reddit — along with the consumers obsessed with these products, and the investors who stood to profit from them — tried to pretend that the noxious speech prevalent on those platforms wouldn’t metastasize into physical violence. In the early years of this decade, back when people associated social media with Barack Obama or the Arab Spring, Twitter executives referred to their company as “the free-speech wing of the free-speech party.” Sticks and stones and assault rifles could hurt us, but the internet was surely only a force for progress.
No one believes that anymore. Not after the social-media-fueled campaigns of Narendra Modi and Rodrigo Duterte and Donald Trump; not after the murder of Heather Heyer in Charlottesville, Va.; not after the massacres in a synagogue in Pittsburgh, two mosques in Christchurch, New Zealand, and a Walmart in a majority-Hispanic part of El Paso. The Christchurch gunman, like so many of his ilk, had spent years on social media trying to advance the cause of white power. But these posts, he eventually decided, were not enough; now it was “time to make a real life effort post.” He murdered 51 people.