Satoshi Nakamoto may not exist. The name may be of a single individual representative who wishes to remain anonymous, or a collection of people who share a common vision. Outlined in the whitepaper,
Bitcoin: A Peer-to-Peer Electronic Cash System.
Verifiable, immutable online transactions.
Satoshi Nakamoto is credited with the invention of the Blockchain. It is the Blockchain that changes everything.
Bitcoin P2P e-cash paper 2008-11-01 19:16:33 UTC
"I have been working on an electronic cash system that's fully peer-to-peer, with no trusted third party. The paper is available at: https://bitcoin.org/bitcoin.pdf"