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RChain is a fundamentally new blockchain platform rooted in a formal model of concurrent and decentralized computation. The RChain Cooperative is leveraging that model through correct-by-construction software development to produce a concurrent, compositional, and massively scalable blockchain. RChain was the culmination of a number of innovations by founder Greg Meredith. The core of RChain is based on mobile process calculi, a branch of mathematics with approximately 30 years of history. Together with the experience of other blockchains and other technology, the RChain architecture was documented in July of 2016 and at that time, the goal was to create a blockchain-based social network with inbuilt micropayments functionality i.e. attention economy. Due to the complexity of the project and disagreement between the team members, it was decided that Greg would focus on realizing the vision of RChain. The RChain organizations (the Co-op and Holdings company) were formed in December 2016 – January 2017.