Caveat: Before diving in, please understand that Bitcoin and blockchain though often used interchangeably are not the same thing. We’ll discuss this in more detail.
In 2008, Satoshi Nakamoto (the pseudonym for an as-of-yet unidentified individual) published a white-paper called Bitcoin: A Peer to Peer Electronic Cash System. In this paper, he argued that he had solved the issue of double-spend for digital currency via a distributed database that combined cryptography, game theory, and computer science. Double spend is simply the idea that digital currency can be spent in two places. Satoshi’s creation was a huge innovation because it enabled one entity to confidently transact value directly with another entity without relying on a trusted third party to stand between them.