How can social innovation enable greater collaboration over the world's most pressing challenges? Can decentralized platforms from web3 applications to blockchain technology address the gaps in governance that are currently standing in the way of enhanced coordination and collective decision-making? As the urgency to meet our shared visions for a brighter, cleaner, and safer future by 2030 intensifies, social innovators and platform designers have an important role to play in spotlighting innovative and sustainable solutions to reach our global targets.