Hahaha.You interrupted my video about the Manzikert battle where Byzatine got punted in 1071 to be all "daddy Pope, please stab those Arabs as they mean and took my fortresses' and demeaned my emperor..." to 1st crusade it later.
My guess: syphilis and war.
430 odd was the Peloponnesian plague of Smallpox or typhoid, 480 odd was syphilis with the Persians, as you know, stabbing, hacking and whatnot with public baths and toilets kind of mean you might not have all fingers, toes or other identifiers of such so check penis and oi vey, someone burn that man in a pit plz. Since Xerces kinda razed Athens in 480 odd with that fire, and that was his second attempt at it.
So midway wise had to be abother plague thing for checking a vote, and the other exclusion was just women did masqerade as men and not all men were Greek living/being in Greece, so as they you know, got jiggy with it regardless as any hole was a goal, one way to check if legit voter as there be statues of penis to check and confirm with or they be shoving a scimitar through your face.
Either or.
Syphilis, I would never have guessed, but wrong.
War, wrong as well.
PS: apologies for interrupting your Byzantine History Channel episode, but thanks for your entry.