30 January 2025

Introducing the Major International Relations Theories

Stephen McGlinchey, Rosie Walters and Dana Gold

International Relations theory allows us to ask questions of our history, our present, and even gain insights into our future. It gives us a toolkit that forms an essential part of International Relations as an academic discipline. This extract from Foundations of International Relations (McGlinchey 2022) is designed with three objectives. First, to show when and why each successive theory emerged. Second, to outline the central features of each theory so that you can understand the basics of how they work and get an appreciation of the insights they offer. Finally, to unpack certain elements of the theories to reveal some of their complexity. Due to its complexity and diversity, newcomers often have difficulty in grasping International Relations theory. So, in order to consider the field as a whole for beginners it is necessary to simplify International Relations theory. Here, we do so by splitting theory into three categories – ‘traditional’, ‘middle ground’ and ‘critical’. In order to simplify further, the various named theories will be presented as theory families. Much like real families, theory families have members who disagree on many things – but they still share core commonalities.

Theories allow us to understand and try to make sense of the world around us through different perspectives – each of which are ways to simplify a complicated world. Theories are like maps. Each map is made for a certain purpose and what is included in the map is based on what is necessary to direct the map’s user in a clear, and useful, manner. Embarking on the study of International Relations without an understanding of theory is like setting off on a journey without a map. You might arrive at your destination, or somewhere else very interesting, but you will have no idea where you are or how you got there. And you will have no response to someone who insists that their route would have been better or more direct. Each different theory puts different things on its map, based on what its theorists believe to be important. Variables to plot on an International Relations map would be such things as states, organisations, individuals, economics, history, class, power, gender and so on. Theorists then use their chosen variables, and omit the others, to construct a simplified view of the world that can be used to analyse events – and in some cases to have a degree of predictive ability.

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