Causes of the Russia-Ukraine War: Strategic Depth and NATO Expansion

1. The Foundation: Long-Term Causes

The decision to launch a full-scale invasion was not made in a vacuum. It was the culmination of centuries of historical experience and deep-seated security perceptions.

The Tyranny of Geography and the Need for Strategic Depth

As you know from your reading of Tim Marshall's Prisoners of Geography, Russia's geography is both a blessing and a curse. Its vast size provides strategic depth, but its lack of natural barriers on its western frontier creates a permanent sense of vulnerability.

Let's hear directly from Tim Marshall as he explains this crucial geographic reality.

This perpetual vulnerability, born from geography and reinforced by history, is a fundamental long-term cause of Russian behavior. The desire to control the flatlands to its west—to create a buffer—is not a recent invention of Vladimir Putin's regime; it is a centuries-old strategic imperative.

Strategic Culture and National Identity

Beyond geography, a nation's "strategic culture"—its shared beliefs, attitudes, and historical narratives about security and its role in the world—shapes its actions. Russian strategic culture is defined by several key elements that contribute to its actions in Ukraine.

To understand this better, let's turn to an academic analysis of this concept.

These cultural elements—the "besieged fortress" mentality and the "great power" identity—combine with the geographic reality to create a powerful long-term driver for Russian foreign policy. From this perspective, a westward-oriented, democratic Ukraine is not just a policy challenge; it is a threat to Russia's historical identity and its fundamental conception of security.

2. The Accelerant: NATO Expansion as a Perceived Existential Threat

If geography and strategic culture are the combustible materials, NATO expansion was the accelerant poured on top. As we discussed in the last lesson, the eastward growth of the alliance throughout the post-Cold War period was viewed in Moscow with increasing alarm.

The key is to understand that regardless of the West's stated defensive intentions, Russia perceived this expansion as an existential threat. Professor John Mearsheimer explains this realist viewpoint succinctly.

This perception is what an academic paper you'll read next calls a ‘Hobbesian Fear’. It's the fear of what a rival could do in the future, even if they have no current intention of doing so.

By connecting the long-term need for strategic depth with the accelerating threat of NATO expansion, we can see how Russia's actions, while a flagrant violation of international law, followed a certain brutal geopolitical logic from its own point of view.

3. The Spark: Immediate Triggers and Miscalculations (2014-2022)

While the underlying causes were in place for years, specific events and calculations triggered the 2022 invasion.

• The 2014 Pivot: The pro-Western Maidan Revolution in 2014 was the immediate catalyst. In Moscow's eyes, Ukraine had decisively "flipped" to the enemy camp. This triggered Russia's initial response: the annexation of Crimea to secure its critical warm-water naval base at Sevastopol and the fomenting of a separatist war in the Donbas to destabilize Ukraine and make it an unattractive candidate for NATO membership.

• Hardening Positions (2014-2021): In the years that followed, positions on both sides solidified. Ukraine amended its constitution to make NATO membership an official goal. The US and other NATO members increased military training and arms supplies to Ukraine. From Moscow's perspective, the threat was not receding but growing more acute.

• The Window of (Mis)Opportunity: By late 2021, Vladimir Putin appears to have made a critical miscalculation. He likely perceived a window of opportunity, believing the West was weak, divided, and distracted.

Let's return to Tim Marshall for an analysis of this final piece of the puzzle.

Putin's calculation was that a "short, victorious war" would quickly topple the government in Kyiv, install a pro-Russian regime, and permanently halt Ukraine's westward drift before a disunited West could mount an effective response. This was a catastrophic misjudgment, both of Ukrainian resolve and of Western unity.

Conclusion

To analyze the causes of the Russia-Ukraine war is to peel back layers of history, geography, and strategy. No single factor is sufficient.

Key Takeaways:

• Long-Term Causes: The war's deepest roots lie in Russia's enduring geographic vulnerability on the North European Plain and its corresponding historical quest for strategic depth. This is reinforced by a strategic culture that sees Russia as a "besieged" great power entitled to a sphere of influence.
• Accelerating Cause: Post-Cold War NATO expansion was the primary accelerant. It activated Russia's deep-seated security fears, and the prospect of Ukraine joining the alliance was explicitly and repeatedly described by Moscow as an existential "red line."
• Immediate Triggers: The 2014 pro-Western turn in Ukraine was the pivotal event that began the active conflict. The final decision to launch the full-scale invasion in 2022 appears to have been driven by a miscalculation that a divided and weak West would not effectively resist, creating a perceived window of opportunity to solve the "Ukraine problem" once and for all.

Understanding this chain of causality—from the deep past to the immediate present—is essential for any serious geopolitical analysis of the conflict and its ongoing consequences.

Preview of the Next Lesson:

Having thoroughly analyzed the causes of the war, our next lesson will shift focus to its effects. We will assess the primary global consequences of the Russia-Ukraine war on energy markets, international alliances, and the global food supply, exploring how a regional conflict has sent shockwaves through the entire international system.