For any who have heard of Blockchain, and for all who have not, I highly recommend taking the time to read this article.
An opportunity to change the way the whole world interacts...?
Most blockchains—and Bitcoin is the biggest—are what you call permission-less systems. We can do transactions and satisfy each other’s economic needs without knowing who the other party is and independent from central authorities. These blockchains all have a digital currency of some kind associated with them, which is why everybody talks about Bitcoin in the same breath as the blockchain, because the Bitcoin blockchain is the biggest. But to me, the blockchain, the underlying technology, is the biggest innovation in computer science—the idea of a distributed database where trust is established through mass collaboration and clever code rather than through a powerful institution that does the authentication and the settlement.