Robert C. Castel: Europe’s Security Paradoxes

European leaders are sinking deeper and deeper into the quagmire of geopolitical vulnerability and escalation.

A NATO-központ épülete Brüsszelben Forrás: Anadolu/AFP

A third paradox is the defense paradox: a state strong enough to protect its citizens from all threats is also strong enough to take everything from them.

Similarly, an EU collective security apparatus that becomes powerful enough to deter Russia could also become powerful enough to militarily coerce unwilling member states.

This paradox is not new, either. Even the prophet Samuel warned the Hebrews about this old truth when they demanded a king.

Can Europe avoid these paradoxes and create security without falling into these entirely predictable traps? Can we, like the wise girl in the Hungarian folk tale about King Mathias, "come and not come, give and not give"?

One potential answer is the Non-Offensive Defense (NOD) concept.

The Concept and Application of Non-Offensive Defense (NOD)

Non-Offensive Defense (NOD) is a military strategy focused on effective territorial defense without offensive capabilities. Its goal is to: enhance stability, reduce security dilemmas and promote arms control and disarmament.

The core principle of NOD is to structure armed forces in a way that makes clear that we can defend our national territory, but we lack the capability to conduct offensive operations.

NOD can be defined both structurally and functionally: structurally – by shaping the military’s posture and technology, and functionally – by limiting military operations to purely defensive roles. NOD is not a binary concept, but a spectrum, with states at various points along the continuum.
One of the main objectives of NOD is to address the security dilemma. As mentioned above, in the international system, it is often the case that the defense build-up of one state can be interpreted as offense capabilities by others, which can lead to competition in terms of quantity and quality of arms. NOD seeks to reduce this risk by putting military capabilities in the exclusive service of defense.

A key principle of NOD is "defensive sufficiency"—meaning military forces should be strong enough to defend national territory but should not develop offensive capabilities.

 This also points to the need for a clear distinction between attack and defense. Although it is difficult to draw a precise line at the level of individual weapon systems, the distinction is more prominent at higher levels of military aggregation.

This distinction helps reduce arms races and prevent perceived threats from triggering preemptive military responses.

Where’s the Catch?
If NOD is such a simple solution, why has the concept practically disappeared from defense policy discussions? Primarily because the effetive application of NOD poses a number of challenges.

The biggest challenge is defining and verifying what counts as offensive or defensive capabilities. Some systems, for example, missiles and fighter jets are difficult to classify as strictly defensive or offensive. 

Similarly, air and naval forces are also difficult to categorize. They are traditionally seen as offensive, so special mechanisms would be needed to ensure they serve only defensive purposes.

Another major issue is political will and trust. NOD’s effectiveness depends on how credibly other nations perceive a state's defensive posture.

But mistrust and perceived threats can undermine even the best-intentioned defensive strategies.

Ironically, NOD itself has created its own paradox: The greater the need for the tension reduction NOD can ensure, the less the necessary trust needed to implement it exists.

The author is an expert on security policy at the Center for Fundamental Rights, and a senior staffer at Magyar Nemzet.