Professor @Penn@perryworldhouse. Former DASD for Force Development and Emerging Capabilities. Defense, #AI, and innovation. Always Boston. Views my own.
The US must learn the right lessons from the Iran War to stay ahead. Can't keep treating precise mass capabilities like they are a niche afterthought on offense or defense!
When it comes to offensive capacities, “the military gap between rich states and poor ones” has closed, writes @mchorowitz. How can the United States maintain its edge in this new era of warfare?
foreignaffairs.com/iran/how-…
This is hopefully pretty good news, though I don't know the details. Designing and implementing sandboxes to test and evaluate frontier AI models is essential for their safe adoption in the IC and military. There's real work that has to be done and that costs $$$
Scoop: The National Security Agency is spending billions this year on testing AI models - far more than previously known
Per a classified NSA estimate described by sources
Compute costs for AI have exploded - including for taxpayers
washingtonsun.com/technology…
“The world is learning from Iran, building on what Ukraine had already made clear: the future of war lies in part in precise mass,” writes @mchorowitz.
foreignaffairs.com/iran/how-…
New in @ForeignAffairs: Iran proved that precise mass is here. Cheap missiles and one-way attack fired at scale outperformed expectations, and no one can keep intercepting $35K Shaheds with $4M Patriots. The US has to build and change for this, not deny it foreignaffairs.com/iran/how-…
Ahead of the May Trump-Xi summit, @Lingling_Wei previewed a possible US-China AI crisis hotline.
At the time, I indicated that this was a good step - but that the question was whether anyone would pick up the phone.
Now, it seems like it will be a summit deliverable.
We reported the AI hotline in May. Apparently it's still being discussed. wsj.com/world/china/u-s-and-… “The fundamental question is not whether we create a hotline—which I think has some value—but whether the Chinese will use the hotline, which historically they haven’t done,” @RushDoshi
Succeeding in the era of AI is about adoption, regardless of where you land on guardrails. It's adoption that will determine whether America or another country benefits the most artificial intelligence. And higher AI literacy will help in buying down risk!
To win the AI race, Washington should stop fixating on the prospect of superintelligence and start emphasizing “practical investments in the development and rapid adoption of AI,” argue @mchorowitz and @Lauren_A_Kahn.
foreignaffairs.com/united-st…
Forthcoming article in @ISQ_Jrnl!
Trump and Xi are sitting down to talk AI this week. @AnthropicAI says we need to "pace the frontier"—and we need China's help to do it.
Could the US and China ever agree on arms control for frontier AI? What would it take?
🧵 [link below] 1/
.@mchorowitz and @Lauren_A_Kahn discuss the United States’ pursuit of artificial general intelligence—and argue that Washington should “treat the AI race with China like a marathon, not a sprint.”
foreignaffairs.com/united-st…
We are excited to announce our new cohort of Distinguished Visiting Fellows for 2026-27! 🌍 👏 Throughout the year, Pennstudents and faculty will be able to engage with and learn from this outstanding group of experts from around the world. Read more: perryworldhouse.upenn.edu/ne…
Have to be ready to compete in AI over time and adoption will be key - which also means guardrails can help when they build trusted confidence in the reliability of AI systems! @Lauren_A_Kahn & I ⬇️⬇️
.@mchorowitz and @Lauren_A_Kahn discuss the United States’ pursuit of artificial general intelligence—and argue that Washington should “treat the AI race with China like a marathon, not a sprint.”
foreignaffairs.com/united-st…
To win the AI race, Washington should stop fixating on the prospect of superintelligence and start emphasizing “practical investments in the development and rapid adoption of AI,” argue @mchorowitz and @Lauren_A_Kahn.
foreignaffairs.com/united-st…
New from @TheEconomist: a look at what China would face in a war over Taiwan featuring insight from PWH Director @mchorowitz on the strategy, technology, and risks shaping the Taiwan Strait. Read here: economist.com/asia/2026/09/1…
PWH Director @mchorowitz on the Pentagon's aging networks in a quote for a @washingtonpost piece: "The risk is that adversaries gain a greater ability to disrupt U.S. information networks to get access to American military data and thus compromise national security." Link ⬇️
International cooperation on AI will be incredibly hard even if everyone wants it because AI is a general purpose technology, and the possible economic gains create strong incentives for development and use. Think standard setting, not arms control.
Need to see more of this - both procurement and integration - from the US military in an age of precise mass. Legacy systems are not enough + now is the time to move! axios.com/2026/08/26/sandhil…?
"Winning" at AI will be all about adoption, both to capture advantages and mitigate risks! Check out @Lauren_A_Kahn & I on this in @ForeignAffairs last year
To win the AI race, Washington should stop fixating on the prospect of superintelligence and start emphasizing “practical investments in the development and rapid adoption of AI,” argue @mchorowitz and @Lauren_A_Kahn.
foreignaffairs.com/united-st…