No one can be sure, but there is an ancient Persian fable that recognises a woman as the discoverer of wine. According to the fable, she was a princess who had lost favour with the King. The shame was so overwhelming that she ate some table grapes that had spoiled in their jar in an attempt to end her life.
Her suicide did not go as planned - instead of slipping into eternal slumber she got giddy, intoxicated and then passed out. When she awoke she found all the troubles of her life seemed to have passed. She continued to eat the spoilt grapes and her mood changed so much that she regained the favor of the King.
Although this is a pleasant tale, the accidental discovery of wine probably happened a few times in different regions, but what is for sure is the invention of wine is down to pure dumb luck.