A new strategic competition between the United States and China over nuclear fusion, a technology that could potentially provide enormous amounts of low-carbon energy. Fusion works by combining light atomic nuclei under extreme temperatures and pressures, releasing energy in the process. Unlike conventional nuclear fission, it does not rely on splitting heavy atoms, which makes fusion attractive as a possible long-term source of abundant electricity.
China has been investing heavily in fusion research and large experimental facilities, while the United States has a strong ecosystem of national laboratories, universities and private fusion startups. The competition matters because whoever achieves commercially viable fusion first could gain an important technological and geopolitical advantage. Cheap, abundant electricity would have implications far beyond the power sector, including AI data centres, manufacturing, transportation and national security.
The connection with AI is particularly important. The rapid expansion of AI is creating enormous demand for reliable electricity and computing infrastructure, making energy increasingly strategic. If fusion eventually becomes commercially practical, it could help address one of the biggest constraints on the AI boom: the availability of large quantities of affordable, dependable power. But fusion remains technically difficult, and achieving a sustained reaction in a laboratory is very different from building an economically competitive commercial power plant.
The broader takeaway is that the AI race and the energy race are becoming increasingly intertwined. The countries that lead advanced computing may also need to lead in energy technologies capable of supporting it. Fusion is still a long-term bet rather than an immediate solution, but the US-China competition shows why advanced energy technology is becoming a strategic component of the broader technology race.
