The norm of reciprocity is a social phenomenon that plays an important role in many cultures and societies. It describes the principle of give and take, in which people tend to reciprocate the behaviour of others in relation to themselves. This means that when someone performs a benevolent act or gesture towards a person, the receiving person tends to do something similar in return.

This norm of reciprocity can occur in different ways. It can occur in simple everyday situations, such as when someone helps a friend move house and later expects that friend to help with their own move. However, it can also play a role in more complex social interactions and relationships by fostering trust and co-operation.

In psychology, the norm of reciprocity is often seen as an important mechanism that strengthens social bonds and supports co-operation in a society. People feel obliged to reciprocate or show appreciation when something good happens to them, and this helps to maintain healthy interpersonal relationships.

It is important to note that the norm of reciprocity is not always limited to direct exchange. Sometimes people also feel obliged to behave benevolently towards third parties if they themselves have received help or favours from others. This shows how far-reaching and complex this social phenomenon can be.

In today's connected world, the norm of reciprocity also plays a role in social media and online interactions. Sharing content, giving likes and commenting on posts are all forms of reciprocity that play a significant role in the digital era.

In summary, the norm of reciprocity is a fundamental social principle that influences our behaviour in a variety of social contexts. It promotes cooperation, trust and interpersonal relationships and is an essential part of our social interactions.