Social influence is defined as the change in an individual’s thoughts, feelings, attitudes, or behaviours that results from interaction with another individual or group. It refers to the change in behaviour that one person causes in another, intentionally or unintentionally. As a result, the changed person perceives himself in relationship to the influencer, other people and society in general. Because of the social factor, people are what they are.

• Social influence can also be defined as the process by which individuals make real changes to their feelings and behaviours as a result of interaction with others who are perceived to be similar, desirable, or expert. People adjust their beliefs with respect to others to whom they feel similar in accordance with psychological principles such as balance. 

Thus from the above-mentioned points, it is clear that "People are the way they are" because of social factor.

Three areas of social influence are conformity, compliance and obedience. Conformity is changing how you behave to be more like others. This plays to belonging and esteem needs as we seek the approval and friendship of others. Conformity can run very deep, as we will even change our beliefs and values to be like those of our peers and admired superiors.