Mike Liberty

Co-founder and Chief Risk Officer at @signifyd. Girl dad. Cancer survivor. Abundance. @UChicago, @StanfordGSB (he/him)

[Mike Liberty @sharedliberty]

If you're the head of ANY organization (CEO, founder, govt official) and not pushing your people to adopt generative AI as fast as possible, you're just waiting to die. If you're on a board and not asking about AI, you're incompetent. Every real maker I know is using it.

[Mike Liberty @sharedliberty]

IMO, this is the right take on what we typically consider "User Interfaces" today, i.e. bespoke, browser- and app-based visualizations of information. It'll be similar to how we went from rotary phones + phonebooks + paper maps + CD players + CDs + newspapers to smartphones

[a16z @a16z]

Marc Andreessen says in the future, we may not have programming languages or even user interfaces:

"I kind of think that in 10 years, I'm not sure there will even be a salient concept of a programming language in the way that we understand it today."

"If you project forward, you have to think forward to a world in which it's just—I'm going to tell the thing what I need, and it's going to do it in whatever way is most optimal."

@pmarca with @latentspacepod

[Mike Liberty @sharedliberty]

Let's gooooo!

[Jonathan Berk @berkie1]

"Rent control is not going to be the solution to how we get through this crisis. We need to build more homes.

I'm a no because if you look at the studies, you effectively halt production... I don't want to see housing production stopped."

- Massachusetts Governor Maura Healey

[Jess Coleman @jesskcoleman]

It still blows my mind that Jim Crow-era zoning laws—even literal bans on multi-family housing in wealthy neighborhoods—somehow got rebranded as progressive regulation.

[@jason @Jason]

1. If we can import the smartest people, show them how great America is & make them loyal citizens, that’s a huge win.

2. Of course, America has to be great. when immigrants compare our declining empire and violent deportations to our competitor’s offerings, we might not be as attractive as think

[Crémieux @cremieuxrecueil]

Bill Gates' perspective on this is imminently reasonable.

Had the world kept going without all the major technological leaps of the past decade, we could be on a path to devastation.

But as his article notes: technology is winning!

[Jacob Frey @Jacob_Frey]

We set out to make housing more attainable and affordable in Minneapolis, and we are. I'm incredibly proud of our progress, let's keep going.

[Aaron Reichlin-Melnick @ReichlinMelnick]

Every developed country in the world — from Norway to China to the USA — is seeing a drop in fertility rates as people get wealthier and women get more ability to make choices about family planning.

The only PROVEN way to keep above the replacement rate? Immigration!

[Jason Sorens @JasonSorens]

New Hampshire has legalized something we haven't had in over a century: free-market electricity. If you don't connect to the grid, under a new law the PUC has no regulatory authority.

[Dr. Jon Slotkin @slotkinjr]

As a neurosurgeon I care a lot about road safety.

By now you’ve probably seen @Waymo’s stunning safety results (like 91% fewer serious crashes). But they didn’t just publish data headlines. They released the raw CSV files and data dictionaries.
I did a much deeper analysis. A fascinating story emerges when you analyze how they’re achieving this.

This isn’t incremental improvement - it’s categorical. We’re looking at the potential elimination of traffic deaths as a leading cause of mortality.

The intersection breakthrough: Waymo has essentially solved intersection crashes, with 95% fewer injury incidents than human drivers in the same locations. That’s transforming the deadliest driving scenario.

The national math: If every US vehicle performed like Waymo, we’d prevent 33,000-39,000 deaths annually and save $0.9-1.25 trillion in societal costs. Even partial adoption at 27% would save ~10,000 lives per year. In terms of magnitude, this would be the equivalent of eliminating every pedestrian death nationally in a year.

The physics signature: Here’s what fascinates me: 47% of Waymo’s contacts involve less than 1 mph delta-V. They’re not just avoiding crashes; they’re converting unavoidable incidents into gentle bumps. It’s like having physics itself on your side.

We’re not talking about marginal safety gains. The data represents a fundamental shift from harm reduction to harm prevention.

The methodology matters: I used their dynamic geographic benchmarks (comparing like-for-like road conditions) and verified the findings hold across San Francisco, Phoenix, LA, and Austin. The safety advantage actually increases in more complex urban environments.

Link to raw data below….

Notes on my approach:

Analysis based on 96 million miles of Waymo Rider-Only (RO) data through June 2025, utilizing Waymo's dynamic geographic benchmarks to compare Waymo Driver performance against human drivers under similar road conditions and operational design domains.

The projections for national impact (deaths prevented, societal costs) involve several assumptions. Given Waymo's zero reported fatalities, the direct serious injury reductions were mapped to national fatality statistics using established NHTSA-derived ratios that correlate serious injury crash rates with fatality rates. This extrapolation assumes that Waymo's observed serious injury prevention capability would translate proportionally to fatality prevention. Societal cost savings are estimated by applying average per-fatality and per-injury economic costs (e.g., medical, lost productivity, quality of life) as published by NHTSA, scaling these national averages to the projected number of avoided fatalities and injuries based on Waymo's safety performance. These figures represent the potential annual impact if the Waymo Driver's safety profile were widely integrated into the national fleet.

@ethanteicher

[Alec Stapp @AlecStapp]

This should be a wake-up call for US policymakers:

[YIMBYLAND @YIMBYLAND]

Abundance works and Austin is ground zero.
You can literally just build more housing.

[Noah Smith 🐇🇺🇸🇺🇦🇹🇼 @Noahpinion]

The bulk of the world's intellectual talent lies within this green oval. If America cuts ourselves off from that talent, we are part of the global periphery.

[Alex Tabarrok @ATabarrok]

In the 1400's China's Admiral Zheng He led seven voyages in ships so vast & magnificent they astonished the world.

But conservative Confucian rule ended the voyages — and China ceded the oceans of discovery just as the European age began.

Same energy today--but in reverse.

[Jed Kolko @JedKolko]

US population growth is slowing, more volatile, and harder to estimate than it used to be, mostly due to immigration swings and also population aging.

That will weaken economic growth -- and will make economic statistics less accurate and more prone to revisions.

[Yoni Appelbaum @YAppelbaum]

"“I don’t want to know your ideology, because you can’t build anything. It does not matter.”

Obama weighs in on the Abundance wars

[Ta-Nehisi Quotes @steady_drumbeat]

Seder has been attacking Abundance for weeks. Ezra comes on & it turns out Sam agrees with him that it's impossible to build enough affordable housing given current costs. When Ezra asks him how to decrease those costs, he can only pivot. HE HAS NO ANSWER.
https://t.co/rPSHzbTLiO

[Mike Liberty @sharedliberty]

NH Ten-Year Transportation Plan funding should likewise be linked to zoning reform and participation in the Housing Champions program. #nhpolitics #abundance

[Aaron Regunberg @AaronRegunberg]

@mattyglesias FYI this is from Bernie's 2020 platform.

[Lawrence H. Summers @LHSummers]

“This is the biggest self-inflicted wound we’ve put on our economy in history. … Until we have a reversal, I think we’re going to have a real problem.” Watch my interview on @ThisWeekABC with George Stephanopoulos.
https://t.co/zyPBl3xCQe via @YouTube

[Lawrence H. Summers @LHSummers]

The markets think companies are going be worth $5 trillion less than they thought before these tariffs started. If you add in the loss to consumers, a reasonable estimate would probably be something like $30 trillion. How big is all of this in comparison? The loss to the economy is like if all oil prices doubled. If prices of gasoline went to $6 or $7 per gallon or something in that range. We've never seen anything like this before. @ThisWeekABC