Mind wars

China’s newly released 15th five‑year plan offers a revealing insight into how Beijing understands the future of military power.

Among quantum technologies, nuclear fusion energy, embodied intelligence and 6G communications, the plan identifies brain‑computer interfaces (BCIs) as a ‘future industry’ – a category reserved for technologies with strategic, system-shaping potential. This is not a neutral economic classification. In China’s planning framework, future industries are those expected to underpin national strength, technological leadership and, where relevant, military advantage.

By elevating BCIs to this status, China is signalling that the human brain itself is becoming a domain of strategic competition. Technologies that connect neural activity directly with machines, weapons systems or networks are no longer treated as speculative or distant; they are presented as capabilities to be developed, integrated and scaled. For Australia, this raises an immediate yet uncomfortable question: how should a liberal democracy respond when rivals begin to frame the human mind as a future battlespace?

What are BCIs?

BCIs are systems that enable direct communication between the brain and an external device. They work by reading neural signals, interpreting them using algorithms and translating them into outputs that can control machines or software. Some BCIs also work in reverse, using stimulation to influence neural activity.

BCIs are part of a broader class of neurotechnologies – tools that monitor, record, analyse or alter brain function. This ecosystem includes neural implants, brain-monitoring wearables, neurostimulation devices and AI-driven cognitive analytics. While many applications are therapeutic – supporting people with paralysis or epilepsy, for example – the same technologies have clear relevance for defence and national security.

In military contexts, neurotechnologies may allow faster and improved control of complex systems. Neurostimulation may assist in treating post‑traumatic stress or traumatic brain injury. Neural monitoring may help manage fatigue or improve decision‑making in high‑pressure environments. Used carefully, such technologies could save lives – both military and civilian.

But military neurotechnology also presents risks unlike those posed by earlier advances in weapons or communications.

Technologies that access, interpret or influence neural activity do not simply enhance equipment or extend physical capability; they reach into cognition, emotion and autonomy.  This is what makes neurotechnology strategically and ethically distinct.

Military promise and unprecedented risk

As noted above, neurotechnology offers genuine potential benefits for defence forces. Used carefully and voluntarily, such tools offer operational advantage and could save lives.

However, military neurotechnology also introduces risks that go well beyond those posed by earlier dual-use technologies. Systems that access, interpret or influence neural activity engage directly with mental integrity and freedom of thought – interests long recognised under international human rights law as deserving the highest level of protection.

The military environment exacerbates these risks. Hierarchy is strict. Obedience is expected. Refusing an ostensibly voluntary enhancement or monitoring system may carry significant career consequences. In this context, the possibility of coercion (explicit or subtle) cannot be dismissed. When technologies operate inside the human nervous system, the margin for error is narrow and the stakes are uniquely personal.

Australia is already navigating this terrain. The Australian Defence Force has trialled neurotechnologies that have allowed neural signals to control robotic systems and external devices. As these tools mature, pressure to operationalise such technologies will intensify, particularly as other states move quickly to develop similar capabilities.

That momentum must not override principle.

The limits of current safeguards

International humanitarian law recognises that new means and methods of warfare demand restraint and scrutiny. Article 36 of Additional Protocol I to the Geneva Conventions requires states to review new weapons to ensure they comply with international law. Australia has long taken this obligation seriously, and that tradition is a strategic strength.

But existing review frameworks were designed for discrete, static systems. They are poorly suited to adaptive, AI‑enabled neurotechnologies that can evolve, learn from data and be repurposed over time.

Military neurotechnology therefore raises three hard questions Australia must confront directly.

First, consent. Military service necessarily limits personal autonomy. Orders are lawful commands, not optional requests. In this context, genuine consent to invasive or monitoring neurotechnology cannot be assumed. The risk that personnel feel compelled (explicitly or implicitly) to comply is real. International law protects bodily and mental integrity precisely because these rights are most vulnerable where power is concentrated.

Second, mental privacy and freedom of thought. Neural data is categorically different from other forms of military information. It may reveal emotional states, stress responses, cognitive patterns and vulnerabilities that a person has never chosen to disclose. Freedom of thought is a non‑derogable right under international law. It cannot be suspended, even in wartime.

Third, mission creep. Neurotechnologies developed for therapeutic or defensive purposes may be repurposed for performance enhancement, behavioural modulation or interrogation, without triggering a fresh Article 36 review. Once embedded within military systems, the line between care and control can blur quickly – particularly under the pressure of conflict.

Discipline as a strategic advantage

None of this is an argument against defence innovation. It is an argument for discipline.

The Australian Human Rights Commission’s Peace of Mind report examined the use of neurotechnology, including for national security and defence purposes. It called for stronger, ongoing oversight of military neurotechnology, lifecycle‑based weapons reviews rather than one‑off approvals, and greater transparency wherever possible, consistent with national security. These are practical safeguards designed to preserve legitimacy, trust and long-term capability, not abstract ideals.

Ethical restraint is not a weakness; it is a strategic asset.

History shows that armed forces that embed moral and legal limits into the development and use of military capability are stronger, more trusted and more effective over time. By contrast, technologies deployed without clear boundaries can corrode trust, damage morale and undermine alliances.

For example, the near‑universal prohibition on chemical and biological weapons – enshrined in the Biological Weapons Convention and Chemical Weapons Convention – reflects a shared recognition that some technologies are so corrosive to human dignity, international trust and strategic stability that their military use ultimately weakens, rather than strengthens, those who deploy them. States that breach these norms face global condemnation and risk destabilising security relationships, demonstrating that the unchecked pursuit of technological advantage can carry enduring strategic costs.

China’s five‑year plan reflects an approach in which BCIs are identified as a strategically significant emerging field, with potential relevance for future defence capability. Australia must turn its focus to these same technologies in improving defence capabilities.

However, if military neurotechnology advances without firm boundaries, we risk normalising practices that compromise the very values our defence forces exist to defend. Once such systems are embedded, reversal becomes extraordinarily difficult.

Australia has a choice.

We can pursue defence innovation while insisting that human dignity remains a non‑negotiable baseline. We can make clear that our soldiers are not platforms for experimentation and that the human mind is not simply another battlespace to be optimised. We can ensure that technological power is matched by legal discipline and moral clarity.

This is not about being timid; it is about being deliberate.

When war reaches the human mind, Australia must be clear about where it draws the line.

This article was written by Lorraine Finlay, the Australian human rights commissioner and Patrick Hooton, a human rights advisor at the Australian Human Rights Commission. It was published by The Strategist.