The demonising of others on the internet, or trolling, is one example where this occurs with toxic levels of vitriol. The anonymity provided allows trolls to attack knowing their position makes the recipient relatively defenceless.
Politics is rife with examples of tagging particular groups as "other" so their concerns and needs can be dismissed. Immigration is one where rhetoric paints people as "other", giving licence to treat them badly. Winston Peters is a serial offender in this regard and now it is an election year he is once again going for the "other".
"Far too many people today, if you ask them what they are, they'll say something other than a New Zealander," he said, adding that this was "not how nationhood is built". Many people living in New Zealand did not identify as being from here, so steps should be taken to ensure future migrants were committed, he said.
His argument is that if immigrants do not become like us then they are "other" and we should not tolerate this and, by implication, not tolerate them.
Creating a reaction against the "other" is such an old trick in the political book there's no point listing the references.
It's worth citing Dr Philip Zimbardo, Professor Emeritus at Stanford University, author of the book The Lucifer Effect: Understanding How Good People Turn Evil.
His study of this trait began with the now famous Stanford prison experiment in which college students were randomly assigned roles as guards or prisoners in a pseudo-prison setting.
Within days the guards were treating the prisoners so badly that the experiment was stopped.
One of the warning signs he identified was the creation of an environment in which one group can be treated as "other" and therefore outside the usual moral and ethical concerns.
To quote Dr Zimbardo: "The process begins with stereotyped conceptions of the other, dehumanised perceptions of the other, the other as worthless, the other as all-powerful, the other as demonic, the other as an abstract monster, the other as a fundamental threat to our cherished values and beliefs."
He sees it as crucial that societies and communities maintain a watch over its citizens and governments for any signs of creating an "other" and not condone but challenge this before it enables good people to do bad things to other people.
Terry Sarten is a writer, musician and social worker. Feedback: tgs@inspire.net.nz