Social Networks Theory is a concept that studies the relationships between individuals or groups, and how these relationships affect their behavior and actions. It aims to understand the dynamics of social structures and how information, resources, and influence flow through them.

History of Social Networks Theory

Social Networks Theory emerged in the 1930s when researchers started studying social structures and their implications on society. However, it was not until the 1970s that the concept gained popularity among sociologists, anthropologists, and psychologists. Since then, several scholars have contributed to its development.

Key Concepts of Social Networks Theory

The key concepts of Social Networks Theory include nodes, ties, centrality, and homophily.


Nodes refer to individuals or groups that are part of a social structure. They can be people, organizations, communities or any other social entity.


Ties refer to the connections between nodes. They can be strong ties such as family or close friends or weak ties such as acquaintances.


Centrality refers to the importance of a node in a social structure. It is determined by factors such as the number of connections a node has with other nodes and the strength of those connections.


Homophily refers to the tendency for people to associate with others who are similar to them in some way. This could be based on factors such as age, ethnicity or interests.

Applications of Social Networks Theory

Social Networks Theory has several applications in various fields such as sociology, psychology, marketing, and business management.

In sociology, it is used to understand how social structures influence behavior patterns such as crime rates or drug use.

In psychology, it is used to study mental health issues and how they are influenced by social structures and relationships.

In marketing, it is used to identify key influencers in a market and Target them for advertising campaigns.

In business management, it is used to understand the flow of information within and between organizations and how this affects decision-making processes.


Social Networks Theory provides a framework for understanding the complex dynamics of social structures. It has numerous applications in various fields and has contributed significantly to our understanding of human behavior. By analyzing the nodes, ties, centrality, and homophily within a social structure, we can gain insights into how information, resources, and influence flow through them.