Pledge to buy N t-shirts conditional on 8 billion others doing the same.
The pledge uses a dominant assurance contract: your pledge only deploys when the total commitment threshold is hit. If the threshold misses by Earth Optimization Day (2026-08-06), nothing happens. If it hits, the bulk shirt order ships.
Currently pledging via this task is intent-only — the pledge tool ships in a follow-up. For now, the most useful action is to wear or DIY the shirt today and tell other humans to do the same.