The Tragedy of Great Power Politics

Offensive realism is built on five foundational assumptions about the international system. First, the system is anarchic, meaning there is no central overarching authority that can protect states from one another. Second, all great powers inherently possess some offensive military capability, giving them the physical means to hurt or destroy rival states. Third, states can never be entirely certain about the intentions of other states, making trust a dangerous vulnerability. Fourth, survival is the primary and overriding goal of all great powers, as territorial integrity and domestic autonomy are prerequisites for pursuing any other objectives. Finally, great powers are rational actors that carefully calculate the long term and immediate consequences of their actions to maximize their chances of survival.

Because the international system forces states to fear one another, survival requires aggressive behavior rather than passive defense. States recognize that their security directly correlates to their power relative to their rivals. Consequently, the ultimate aim of a great power is not merely to maintain the status quo or reach a comfortable parity, but to become the most powerful state in the system. Security competition is therefore endemic and ruthless, as every great power constantly searches for opportunities to gain power at the expense of others, knowing that true safety only exists when no other state possesses the capability to threaten them.

While the theoretical ideal for a great power is to dominate the entire globe, geographical reality imposes a hard limit on expansion. Large bodies of water profoundly limit the power projection capabilities of land forces, making amphibious assaults against well defended territories exceedingly difficult. This stopping power of water means that there has never been a global hegemon and it is highly unlikely one will ever emerge. Instead, the maximum attainable goal for any great power is regional hegemony, which involves dominating one's own geographical neighborhood while potentially controlling adjacent landmasses.

State power is strictly material and must be divided into two distinct but related categories: latent power and military power. Latent power consists of the socio economic ingredients necessary to build a military machine, primarily measured by a state's wealth and overall population size. However, effective power in international politics is ultimately decided by military power, which relies on the size and strength of a state's army and its supporting air and naval forces. Even in a nuclear age, land power remains the supreme instrument for conquering and holding territory, making the army the core ingredient of military might.

Although abundant wealth and a massive population are prerequisites for great power status, the distribution of economic might does not perfectly mirror the distribution of military power. States convert their wealth into military power with varying degrees of efficiency, often influenced by how well they rationalize their economies for mass weapons production during total war. Furthermore, states face diminishing returns on defense spending and must choose different types of military investments based on their geography. An insular power might spend heavily on a navy to protect sea lanes, while a continental power must invest heavily in a standing land army to deter immediate land border threats, meaning equal wealth does not automatically equate to equal offensive capability.

States that are separated from other great powers by large bodies of water enjoy a massive defensive advantage. These insular states, once they achieve regional hegemony in their own hemisphere, have little incentive to conquer distant regions across the ocean. Instead, they adopt a strategy of offshore balancing. The primary goal of an offshore balancer is to prevent the rise of a peer competitor in another core region. The insular hegemon preserves its freedom to roam globally by ensuring that potential rivals in other regions are bogged down in local security competitions, intervening directly only when local powers fail to contain a rising hegemon.

When faced with a rising potential hegemon, threatened states generally prefer to pass the buck rather than immediately form a balancing coalition. Passing the buck allows a state to avoid the exorbitant costs and risks of confronting an aggressor, hoping instead that another local power will absorb the blow and contain the threat. Geography dictates these dynamics, as states sharing a common border with the aggressor are highly likely to become buck catchers forced to defend the balance of power. Only when the potential hegemon controls so much relative power that buck passing fails will all threatened states unite into a formal balancing coalition to ensure their mutual survival.

The architecture of the international system, defined by the number of great powers and the distribution of power among them, determines the likelihood of war. Bipolar systems, consisting of only two great powers, tend to be the most peaceful because power calculations are straightforward and deterrence is robust. Multipolar systems contain higher risks of miscalculation and conflict. The most dangerous architectural arrangement is unbalanced multipolarity, in which a system contains three or more great powers and one of them controls a disproportionate amount of power, positioning it as a potential hegemon. In these volatile environments, intense security competition frequently breaks down into deadly conflict.

Offensive realism intentionally ignores the domestic political makeup, ideologies, and cultural identities of individual states. Whether a state is a liberal democracy or an authoritarian regime has no independent effect on its grand strategy. Great powers operate as uniform billiard balls that vary only in their material size and relative power. International institutions and shared values similarly fail to constrain state behavior, as powerful states merely design and use these institutions to maintain or increase their own share of world power. In this structural architecture, geopolitical realities and material capabilities universally override any non material motivations.