Jed McCaleb
Founded the eDonkey peer-to-peer file-sharing network in 2000 before it was shuttered under RIAA pressure in 2005. Created Mt. Gox as a Magic: The Gathering card exchange, then pivoted it into the first major Bitcoin exchange in 2010, selling it in 2011. Co-founded OpenCoin (later Ripple) in 2012, architecting the XRP Ledger consensus protocol, before departing in 2013 over strategic differences. These experiences — building decentralized networks, operating cryptocurrency infrastructure, and designing a blockchain consensus mechanism — directly informed the launch of Stellar in 2014, a fork of the Ripple protocol re-architected for non-profit governance and a more inclusive access model.