A16Z
AI Can Design Hardware Brilliantly—It Just Can't Build It Yet
The frontier models can now sketch a circuit board, model a bracket, even spec out parts for a desktop lamp. But designing hardware, it turns out, is the easy part. The real bottleneck sits at the messy seam between digital files and physical atoms—a boundary that engineers call "lossy," and for good reason.
Turning a CAD file into a working object means sourcing components that may sit in warehouses thousands of miles apart, translating designs into machine instructions that depend on a human machinist's judgment, and stacking dozens of individually perfect parts into an assembly that somehow still doesn't fit. Scale that from one unit to a million, and the problems compound: vendors falter, tolerances drift, and variance creeps in everywhere—as one supply-chain veteran learned the hard way when a supplier was secretly injecting water into chickens before shipping them.
The physical world, this story argues, resists digitization in ways the digital world never did. It's non-uniform, sparse in its data, expensive to measure precisely, slow to test, and sometimes maddeningly qualitative—nobody can simulate whether a customer actually likes how a product feels in their hand.
So while AI may soon out-design any human engineer, becoming a true superhuman builder requires cracking an entirely different set of problems: better physics simulations, deeper "process knowledge" now locked in the hands of master technicians, and new infrastructure to feed real-world feedback back into the machine. The payoff, once achieved, could be enormous—but the path there runs straight through the physical world's stubborn imperfections.
Wisodm of Crowds
Why Losing Faith in Hell Might Be Breaking Our Politics
Only 59% of Americans still believe in hell, down from 71% just two decades ago—and almost no one, even the devout, talks about it anymore. A new book argues this quiet theological shift carries an unexpected political cost. Drawing on Hannah Arendt's observation that secularization strips public life of "the fear of hell," the authors trace how Thomas Hobbes deliberately tried to dismantle belief in eternal damnation to consolidate state power—only for damnation to resurface in secular form. The result, they argue, is a culture obsessed with public punishment: viral shaming, true-crime spectacles, cancel campaigns, and political slogans demanding instant, total justice. Unlike the medieval vision of hell—delayed, distant, and still leaving room for redemption—our modern version is immediate, inescapable, and directed entirely outward at enemies rather than inward at ourselves. The piece contrasts this with how religious traditions actually use the concept: not as a weapon against outsiders, but as a mirror for self-examination, and as a kind of cosmic equalizer where the rich and powerful can't buy their way out of judgment. Without that belief, the argument goes, politics gets overloaded—forced to deliver perfect justice and total moral reckoning here and now, fueling the very polarization and cynicism that faith in an ultimate, otherworldly justice once relieved. It's a provocative case that democracy might actually need more fire and brimstone, not less.