With due respect to Satoshi for creating bitcoin, i felt fascinated with the fact that Chaum actually gave the basic concept of blockchain back in 1980s, when there was no internet and for such wonderful work in those pre internet era time we must be appreciate this person.
The internet didn't exist in the form we know today but in a way it did exist from the 60s. "Paul Baran proposed a distributed network based on data in message blocks in the early 1960s".
It was basically a smaller "network" between computers that could communicate with each other. It is like Bitcoin, there were other works done prior to Bitcoin but none of them could come to success. There were also no successful "blockchain" in any of them that solves the problems that Bitcoin did.