Two Decades of the Global War on Terror: Legacies and Future

Strategic Argument and Areas of Debate

By instrumentalising the Global War on Terror through aggressive Orientalist and counter-terrorism discourses, the United States sought to secure hegemony over the Eurasian heartland, yet ironically accelerated its relative decline and precipitated the emergence of a multipolar geopolitical order. This strategic overextension ultimately exposed the profound limitations of American hard power and forced traditional allies, particularly within Europe, to confront their debilitating reliance on the US security umbrella.

Executive Summary

The withdrawal of forces from Afghanistan under President Joe Biden marks the definitive conclusion of the Global War on Terror initiated by George W. Bush, signalling a profound geopolitical shift away from American unipolarity. Driven by neoconservative ambitions to dominate the Eurasian heartland and secure vital energy supply routes, this decades-long military adventurism fundamentally eroded US global hegemony while normalising marginalising discourses against Muslim communities. Consequently, the abrupt recalibration of American strategic priorities towards countering near-peer competitors like China and Russia leaves European allies and NATO vulnerable, exposing severe capability gaps and amplifying urgent demands for European strategic autonomy.

Analytical Framework and Key Drivers

Discursive Legitimisation of Warfare: Successive administrations utilised aggressive Orientalist rhetoric and a simplified counter-terrorism narrative to circumvent international law and justify immense military mobilisation following the September 11 attacks.

Eurasian Heartland Strategic Control: American military interventions in Central Asia were fundamentally driven by Halford Mackinder’s geopolitical theory, aiming to control vital energy infrastructure and prevent Russia or China from dominating the Eurasian landmass.

Neoconservative Hegemonic Ambition: Pre-emptive military actions were heavily influenced by the Project for the New American Century, which explicitly advocated for the removal of foreign adversaries to establish undisputed American global supremacy.

European Strategic Dependency: The abrupt American strategic recalibration exposed severe military capability gaps within the European Union and NATO, demonstrating the total inability of European powers to operate autonomously without the United States.

Strategic Assessment & Empirical Findings

• The conclusion of the two-decade military campaign in Afghanistan resulted in a decisive return to power for the Taliban, demonstrating the failure of imperialist endeavours despite the expenditure of trillions of dollars.
• By reclassifying the 2001 attacks as an act of war rather than a criminal investigation, American administrations bypassed international legal frameworks, facilitating systemic human rights abuses at facilities like Guantanamo Bay and Abu Ghraib.
• Geopolitical forecasts indicate that by 2030, Asian nations will surpass both North America and Europe across critical metrics including gross domestic product, population size, and technological investment.
• The implementation of the 1999 Silk Road Strategy Act allowed Washington to establish a new security architecture across Central Asia, effectively securing pipeline routes while circumventing Russian and Iranian influence.
• European military deficiencies became undeniable following the Afghan withdrawal, highlighting critical capability gaps in areas such as strategic transport and mid-air refuelling that restrict independent European Union operations.

Geopolitical Trajectories & Policy Risks

• The European Union faces acute vulnerability regarding strategic autonomy, as continuous disinvestment in defence infrastructure prevents independent crisis management in neighbouring regions like Ukraine and the Sahel.
• The United States risks strategic overextension and institutional fatigue if it attempts to simultaneously contain an ascending China while managing the diplomatic fallout of abandoning regional security commitments in the Middle East.
• Central Asian states remain exposed to escalating great power competition, as the American withdrawal creates a geopolitical vacuum that actively accelerates regional competition between China and Russia over critical energy resources.

Critical Policy Questions & Responses

Question 1 Why did the United States leverage Orientalist and counter-terrorism discourses to justify its military interventions in Central Asia?

Answer: American policymakers and neoconservative institutions deployed these reductionist narratives to manufacture domestic consent for a grand geopolitical strategy aimed at dominating the Eurasian landmass. By framing the conflict as a civilisational struggle, the United States successfully bypassed international legal constraints, facilitating unquestioned military expansion and the pursuit of strategic energy reserves.

Question 2 How does the American withdrawal from Afghanistan fundamentally challenge the strategic posture of the European Union?

Answer: The unilateral withdrawal unequivocally demonstrated that European military forces, constrained by decades of financial underinvestment, are incapable of executing independent operations without the logistical and strategic support of the United States. This jarring realisation of total reliance on the NATO security umbrella is compelling European leaders to urgently reassess their systemic vulnerabilities and pursue genuine strategic autonomy.

Question 3 What does the failure of the Global War on Terror reveal about the limitations of American unipolarity in the twenty-first century?

Answer: The inability to achieve lasting victory despite deploying trillions of dollars over two decades illustrates that insurmountable hard power cannot effectively impose external political systems or eradicate decentralised resistance movements. This geopolitical overreach significantly accelerated the transition towards a multipolar global order, diminishing American hegemonic credibility while empowering emerging power centres in Asia.

Question 4 What strategic trade-offs does the United States face as it transitions from the post-9/11 era to a renewed era of great power competition?

Answer: By shifting focus towards containing the economic and military rise of China, the United States must deliberately abandon its costly nation-building projects and accept a diminished role in the Middle East and Central Asia. This recalibration requires Washington to strictly prioritise vital national security interests over ideological crusades, inherently conceding regional influence to rival nations like Russia and China.

Key Actors and Systemic Dynamics

• United States → Competes with → China
• United States → Competes with → Russia
• European Union → Depends on → NATO
• Project for the New American Century → Shapes → American strategic behaviour
• Global War on Terror → Enables → Central Asian military expansion
• Orientalist discourse → Legitimises → Excessive military force
• Halford Mackinder’s geopolitical theory → Influences → United States
• Taliban → Challenges → American hegemonic ambition
• Central Asia → Supports → Global inland energy supply infrastructure
• Joe Biden → Accelerates → American strategic recalibration