From science fiction to science fact — how countries and companies are racing to commercialize fusion energy and reshape the global energy landscape.
The race isn't between nations like the Cold War space race — it's between companies and technologies. US firms lead, but China, Germany, the UK, and Japan are close behind.
Private sector leaders including Commonwealth Fusion Systems building SPARC
Both public and private companies racing to scale fusion technology
Anti-fission, pro-fusion — doubling down with strong manufacturing base
Separate fusion regulation confirmed; dedicated national strategy
Strong domestic high-tech manufacturing supply chain ready to support fusion
Home to ITER — the world's largest international fusion experiment
It's tempting to say it's the US racing with China... but what's really happening is that there's a kind of global fusion energy program. Scientists have worked together and shared information for decades.
Multiple scientific approaches are racing toward commercial fusion. Each has its own enabling breakthroughs, advantages, and pathways to viability.
The most studied fusion concept — a donut-shaped magnetic bottle that confines superheated plasma. Over 100 tokamaks have been built worldwide, making it the technology with the deepest knowledge base. High-temperature superconducting (HTS) magnets are the game-changer, enabling smaller, cheaper, and more powerful machines.
A twisted variant of magnetic confinement — if a tokamak is a donut, a stellarator is a cruller. Its complex geometry is harder to build but offers a key advantage: inherent steady-state operation without the pulsed disruptions that plague tokamaks. Advances in computational design and precision manufacturing are unlocking its potential.
Lasers compress and heat a fuel target to achieve fusion. The National Ignition Facility (NIF) in California proved this works — achieving controlled fusion ignition in a lab. The key innovation now is diode-based lasers: smaller, cheaper, more resilient, and scalable. Eleven laser fusion companies in the FIA are pursuing different designs.
A hybrid approach combining elements of both magnetic and inertial confinement. Uses magnetic fields to pre-heat and confine plasma, then compresses it rapidly. This can potentially achieve fusion conditions with less extreme requirements than pure magnetic or pure inertial approaches, offering a different path to commercial viability.
Decades of scientific collaboration have built the foundation. Now private companies are turning knowledge into machines — at unprecedented speed.
Fusion reactions first achieved in laboratory settings, launching decades of plasma physics research.
Even at the height of the Cold War, the US, Soviet Union, and UK agreed to share fusion research openly across borders.
The world's largest fusion experiment begins in southern France — designed with maximum confidence but growing costs and delays.
Commonwealth Fusion Systems starts building SPARC in Devens, Massachusetts — a compact tokamak enabled by HTS magnets.
The National Ignition Facility proves controlled fusion energy can work in a lab, achieving more energy out than in from laser-driven fusion.
Commonwealth Fusion Systems demonstrates the most powerful magnet ever made — the key enabling technology for compact tokamaks.
SPARC expected to complete construction this year, with testing and first plasma targeted for 2027.
The next machines aim to prove commercial viability — more energy out than in — paving the way for pilot power plants.
Fusion is fundamentally different from fission — it's hard to start and easy to stop, not the other way around. This demands a completely different regulatory approach.
| ⚡ Fusion | ☢️ Fission | |
|---|---|---|
| Safety Profile | Hard to start, easy to stop | Easy to start, hard to stop |
| Fuel in Reactor | Tiny amounts at any time | Large amounts of condensed fuel |
| Waste | No long-lived radioactive waste | Spent nuclear waste requiring storage |
| Meltdown Risk | Physically impossible | Requires active prevention |
| Regulation | Like a particle accelerator | Heavy nuclear regulation |
| US/UK Status | Separate from fission | Existing nuclear framework |
| Public Acceptance | Strong so far | Mixed — safety concerns persist |
Fusion is very hard to start and easy to stop. Fission is easy to start, hard to stop. Just based on its safety profile, fusion needs to be regulated in a very different way.
Getting fusion to work is only half the battle. Without a ready supply chain, scaling risks repeating the solar and battery story — where Western innovation ceded manufacturing to China.
Plasma physics, HTS magnets, diode lasers
Magnets, capacitors, power supplies, optics
Integrating components into fusion machines
First commercial-scale demonstration
Manufacturing lines, cost reduction, global rollout
The FIA is working with Congress on a tax credit for domestic fusion manufacturing — enabling more investment and faster supply chain scale-up, particularly for the family-owned businesses that make up much of the supply base.
A "friendshored" supply chain across G7 nations plus allies like Korea and Singapore — strategic about what to onshore vs. share, avoiding both autarky and overdependence on any single country.
We've seen this story before. We've seen it in solar. We've seen it in batteries, electric vehicles. If we don't learn the lesson from that, then I think we're just gonna doom to repeat the same mistakes.
Fusion's ultimate promise: turning energy from something you pull out of the ground into something you manufacture in a factory — independent of geography and geopolitics.
Geographically concentrated underground. Creates dependencies that can be weaponized — as seen with Russia's leverage over Eastern European gas supplies.
Dependent on weather and geography — solar needs sun, wind needs wind. Location determines viability and creates its own geographic constraints.
Geographically independent. Manufactured, not extracted. The only limit is how fast you can build — and manufacturing scales through learning curves.
Fusion will turn energy from something you pull out of the ground, or you get from the sun or the wind, into something that is manufactured, something you do in a factory. And the only limit to it is how fast you can manufacture that.
The real story behind fusion's acceleration isn't just plasma physics — it's breakthroughs from other fields converging at the right moment.
High-temperature superconducting wire enables the most powerful magnets ever made. Allows tokamaks to be dramatically smaller while increasing power — the key to commercial viability.
New diode technology makes lasers smaller, cheaper, more resilient, and scalable. The enabling innovation for commercial laser inertial fusion beyond laboratory-scale NIF experiments.
Advances in computing power and AI accelerate plasma simulation, stellarator design optimization, and real-time plasma control — problems that were intractable a decade ago.
Pulse power systems, capacitors, and power supplies — often overlooked but critical components. Advances in semiconductor power management feed directly into fusion systems.
New materials that can withstand extreme conditions inside a fusion reactor — neutron bombardment, extreme heat, and intense magnetic fields over sustained operation.
The ability to fabricate complex geometries — like stellarator coils — with extreme precision. Modern manufacturing techniques make previously impossible designs buildable.
We're in the largest energy crisis since the 1970s. Fusion offers a path to energy that's clean, safe, geographically independent, and scalable without limits.
Fusion produces zero carbon emissions and no long-lived radioactive waste. It offers baseload clean energy that doesn't depend on weather — filling the gap that renewables alone cannot.
By separating energy from geography, fusion removes the ability of hostile states to weaponize energy dependencies — a lesson underscored by Russia's gas leverage over Europe since 2022.
Like Corning's glass revolution with the iPhone, the fusion supply chain will create massive opportunities for companies that position early — from family businesses to multinationals.
Once on a manufacturing line, fusion machines can be mass-produced — driving costs down through learning curves. A century of industrial evidence shows this works.
I think a fusion world is a world that's safer. I'm doing this because it's gonna solve a problem, solve multiple problems at the same time, and we've got to move as fast as we can to do that.