What is a blockchain, anyway?

At the FTC's Fintech Forum, Peter Van Valkenburgh clearly explains what blockchains are and what they specifically can or cannot do.

Based in Washington, D.C., Coin Center is the leading non-profit research and advocacy center focused on the public policy issues facing cryptocurrency and decentralized computing technologies like Bitcoin and Ethereum. Our mission is to build a better understanding of these technologies and to promote a regulatory climate that preserves the freedom to innovate using permissionless blockchain technologies.