He’s a little late to the party. Stoicism as a school of philosophy rose to prominence in the 3rd century B.C. in Greece, then migrated to the Roman Empire, and hung around there through the reign of emperor Marcus Aurelius, who died in 180 A.D.
I'm a little surprised that there is almost no stoic content on hubski. Perhaps all the Reddit stoics are sticking it out through the recent troubles.