Zuckerberg dropped a 6.5k-word manifesto on open source AI. Core argument: centralized AI control creates worse outcomes across the board. His pitch is that distributing model weights broadly is the only path forward that doesn't end in dystopia.

This matters because Meta's been shipping open weight models (Llama series) while OpenAI and Anthropic lock everything down. Now Zuck's making the philosophical case public, not just the business case.

The essay hits on three technical angles:
1. Safety through transparency - more eyes on weights means faster vulnerability discovery
2. Innovation velocity - open weights let researchers fork and specialize without rebuilding from scratch
3. Power distribution - prevents a handful of labs from becoming AI gatekeepers

Biggest mainstream endorsement the open weight movement has gotten. Whether you buy the argument or think it's self-serving (Meta needs open models to compete), it shifts the Overton window on what "responsible AI development" means.