"Absolutely. The only independent thinkers are those who were abandoned as infants and raised by wolves in isolation from human culture. From the time a baby's mother begins to babble back to its babble the baby's mind has been entirely enslaved. No critical thought possible from that time forward."
Possibly why Krishnamurti called "free thought" an oxymoron. But thought is only a sliver of our being and culture touches upon and is shaped by many things outside of it.
Joanna