Studying International Relations, I have to write a lot of essays on does realism explain this, is neoliberalism made redundant because of that, etc.
However, it seems to me that there is no rule that could be said to apply to the international system, making it work a certain way at any point in time. All the theories were valid at some point in time. Realism gives as accurate account of the sitaution leading up to the Second World War. Liberalism offers a more realistic picture of the IR scene nowadays.
I can't pick one single theory and say that its the best, but most people do. The poll is for if you believe any one theory had applied throughout history, and not just today.
Now, discuss.
Realism: States are the only kind of international actor, and act sovereignly on the international scene. They act only to serve their own interests, and believe that any gains they make only acquire meaning relative to those of other states. One's security is another's insecurity, and a balance of power is the best way to maintain peace.
Neorealism: Similar to realism, however acknowledged that states are not the only actors, as economic actors such as multinational coporations also exist, albeit as inferior to states with hard, military power.
English School: Sticks to the basic realist principles that states are the only actors and that they wish to serve their own ends, but also argues that the international scene is not so anarchic as realists suggest. This school of thought believes that while states are selfish actors, they can exist peacefully through means such as diplomacy, internatinal law, and morality, and not just a balance of power.
Liberalism: This is the idealist school of thought, which argues that states can live in harmony if they are brought together by international organisations, and by changes within the states themselves. For example Fukuyama and his belief that liberal democracy is the high point in a state's development, or democratic peace theory (democracies do not go to war).
Neoliberalism: States seek absolute rather than relative gains, and so are brought together through international organisations, and live together peacefully in order to achieve them. For example, embraces the idea of 'complex interdependence', that economic actors cross state borders and give all states a common interest which can only be pursued through consensus.
Marxism: Argues that the whole international system is one based around capital accumulation, serving only certain classes at any given time. Also, Wallerstein's 'world systems theory' argues that resources go from the periphery to the core (with a semi-periphery inbetween), with this first being achieved through colonialism, and now dependence.
Other: Feminist theory, normative theory, whatever.
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