Conversation so far:
Where was Aesop born?
The earliest Greek sources, including Aristotle, indicate that Aesop was born around 620 BCE in Thrace at a site on the Black Sea coast which later became the city Mesembria.
What did Aesop do for a living?
From Aristotle and Herodotus we learn that Aesop was a slave in Samos and that his masters were first a man named Xanthus and then a man named Iadmon
Was Aesop a slave his whole life?
Aesop must have eventually been freed, because he argued as an advocate for a wealthy Samian.
Is anything else known about Aesop's life besides his status as a freed slave?
Aesop went to Delphi on a diplomatic mission from King Croesus of Lydia
Did Aesop stay in Delphi?
Aesop met his end in the city of Delphi.
When did Aesop die?
Aesop died in 564 BCE.
How did Aesop insult the Delphians?
Aesop angers the citizens by telling insulting fables, is sentenced to death and, after cursing the people of Delphi, is forced to jump to his death.

Question: How did Aesop become a diplomat?
Self-contained rewrite: How did Aesop become a diplomat?