Hardness is the capability to make the future more certain. Ethereum offers us hardness. We can give Ethereum code and receive a very strong guarantee that it will run any time we call on it. We can give Ethereum data and know with certainty it will still be available in the future, unaltered and uncorrupted. These simple building blocks give rise to more complex forms of coordination. Money. Contracts. Governance. Identity. Today Ethereum is the hard foundation of a digital economy where mil...