Never, ever, ever subscribe to progressivist views on history. Mankind has been sophisticated for a long, long time.
“It’s [said to be] a linear progression from stupid cavemen to smart old us with our hydrogen bombs and striped toothpaste.” — John Anthony West (who also happens to be a moonbat, but anyway)
Oppenheimer answered: 'Yes, in modern times.'
He Believed our atomic program was not the first, that there were ancient nuclear wars of the distant past.
Oppenheimer was a student of the old books of India, such as the Mahabharata, Bhagavad Gita and the Kansur.
In the Hindu texts, they speak of flying vimanas. Vimanas were said to be the origin of the 'flying carpet.'
Great wars were described in these early texts. Weapons could literally level the land like a moving force field. In ancient India, their are words for certain measurements of length. One was the length of an atom. Oppenheimer believed only a society that possessed nuclear energy would have the need for such words.
When Oppenheimer said 'I am become the destroyer of worlds,' he was quoting from these ancient books. Believe it or not, the deserts on a number of continents today that some say are the result of (prehistoric) nuclear warfare.