Who is credited with inventing tragedy?
Correct answer: Thespis

That Cøunt, Ray Bumpkin
... and is presumably the etymology of the word thespian to describe an actor, yes?

I am not a number.
Thespis is described as "The Inventor of Tragedy" but Aeschylus is described as the "Father of Tragedy".

Yana
Tragedy itself wasn't invented by a human.