“Nothing exists except atoms and empty space; everything else
is just opinion.”
-Democritus
This guy was also known as the "laughing philosopher"
as he found great humor in human folly. He also had
a mysteriously accurate vision of physics and cosmology
and was very close to correct on a number of subjects
even in 5th-century BC. Most of the other pro philosophers
hated him.
In the above quote, he pretty much laid it on the
line - saying "It's Not ABOUT Us" - which surely
punctured a lot of inflated egos.
If it ever becomes possible to pull people forward
in time, I'd vote for Democritus to be the first one.