Artificial intelligence has become one of the most widely discussed technologies in the world. While AI is already being used in areas such as medicine, education, business, and everyday productivity, concerns about its potential misuse have also grown.

Now, Microsoft co-founder Bill Gates has issued a serious warning about what could happen if powerful AI systems fall into the wrong hands.

Gates has argued that artificial intelligence could become powerful enough to contribute to events resulting in enormous loss of life.

AI itself is not new. Researchers and companies have been developing the technology for years, and it is already capable of performing tasks that once required human expertise. Supporters point to its potential to help discover new medicines, improve scientific research, organize information, and create new opportunities.

At the same time, critics and some AI researchers have warned that increasingly capable systems could create serious risks if they are poorly controlled or deliberately misused.

One former employee of major AI companies recently raised similar concerns after leaving the industry. He argued that the rapid competition to develop increasingly powerful systems could carry risks that society is not adequately prepared to handle.

He warned that future AI systems could potentially become capable of performing sophisticated cyberattacks, transforming industries very quickly, and helping individuals or organizations gain access to significant resources.

His comments reflected a broader debate taking place within the technology industry about how quickly AI should advance and what safeguards should accompany that progress.

Bill Gates has now added his own warning to that discussion.

The Microsoft co-founder recently appeared on NBC’s Meet the Press, where he discussed the potential dangers associated with increasingly powerful artificial intelligence.

Gates said AI could become powerful enough to contribute to events that result in extremely large numbers of deaths.

“AI is certainly powerful enough to drive events that cause a billion deaths,” Gates said.

He explained that the greatest concern would not necessarily come from AI acting independently, but from people with harmful intentions using advanced AI systems.

According to Gates, the combination of powerful technology and individuals who deliberately want to cause harm could create risks unlike those humanity has faced before.

His comments focused particularly on biological threats.

AI is increasingly being explored as a tool for scientific research and drug development. The same capabilities that could potentially help scientists understand diseases and create treatments could also raise concerns about misuse.

Gates said one of the difficult challenges will be distinguishing between people using AI for beneficial scientific purposes and those attempting to use similar technology to create biological weapons.

“I wish it was easier to distinguish good intent, like I want to design a new drug for a disease, versus negative intent, which is I want to design a tool of bioterrorism,” he said.

This issue has also been raised by other prominent figures in the AI industry.

Anthropic CEO Dario Amodei has previously discussed both the potential benefits and dangers of increasingly advanced AI. He has argued that AI could dramatically improve people’s lives by helping with medicine, scientific discoveries, and economic productivity, while also acknowledging that existing safety approaches may not necessarily keep pace with the technology’s development.

The debate is therefore not simply about whether AI is beneficial or dangerous.

Instead, much of the discussion centers on how the technology should be developed, monitored, and regulated as its capabilities continue to grow.

Gates has called for governments and law-enforcement agencies to become more involved in determining what safeguards should be required.

He believes companies developing powerful AI systems should be subject to appropriate monitoring and safety requirements rather than leaving those decisions entirely to the technology industry.

“You need law enforcement and the politicians to get into the discussion about what safeguards and monitoring look like,” Gates said.

He argued that such safeguards should eventually become mandatory.

Gates also acknowledged that additional regulations could create some extra work for AI companies, but he suggested that responsible oversight would not necessarily have to bring technological development to a halt.

The comments highlight one of the central questions surrounding artificial intelligence today: how can society benefit from increasingly powerful technology while reducing the possibility of catastrophic misuse?

AI has already demonstrated enormous potential in fields ranging from healthcare to scientific research. But as the technology becomes more capable, experts, governments, and technology companies are increasingly debating how much oversight is necessary.

For Gates, the potential benefits of AI do not eliminate the need to prepare for its possible dangers.

His warning is ultimately part of a much larger conversation about the future of artificial intelligence—and about whether technological progress can move forward while adequate safeguards are developed alongside it.