Just as dangerous speech can teach people to hate and fear others, contradicting it can do the opposite. Counterspeech can improve group discourse either by changing people's hateful or violence-inciting beliefs or by persuading them not to spread such ideas.
People have surely been arguing ever since the first humans learned to talk. But the internet has given vastly more opportunities for what we call counterspeech – any response to hateful or harmful speech that seeks to undermine it – since people are exposed online to far more hatred, disinformation, and dangerous speech from more sources than ever before. Many have spontaneously seized the chance to counterspeak. Around the world, tens of thousands of people respond regularly and directly to what they consider hateful or harmful content online, with some encouraging results.
In our research, we have found many counterspeakers who have persisted at it daily or weekly, for years. Some do it alone, while others work in large groups, following their own codes of conduct. Group members also encourage each other to keep at it, an important practice as their efforts are generally unpaid, repetitive, and emotionally draining. Some groups have kept going consistently for more than seven years. Counterspeech can have a positive effect on discourse in several ways. It can convince people to stop posting or spreading harmful content, by changing their beliefs or only their behavior. (The latter is possible since people can come to fear criticism or social sanction for publicly expressing a belief, even if they still hold it.)
Discourse may also improve without any change in the views or online expression of people posting hatred. Instead, counterspeakers can succeed by influencing the “audience” - the people who read their comments. That audience often greatly outnumbers the original posters and counterspeakers, and often many of them agree with the counterspeakers, but most of them don’t post. Counterspeech can encourage a silent audience to chime in and even become regular counterspeakers, thus gradually shifting discourse toward the views expressed in counterspeech, even if no beliefs change. Audience views can also change, of course, in response to counterspeech.