Well there is much evidence to suggest that farming or agriculture if you prefer began simultaneously among many cultures all over the World at the same time. This would suggest that they either shared ideas perhaps telepathically or gained ideas from the same source.
After all have you ever thought about where ideas, concepts and imagination comes from, how it works and if their are triggers for it. Can we intuitively gather information from each other on a subconscious level, share ideas through dreams and perhaps even communicate through meditation or prayer.
As an artist I often ponder on how my imagination works and if I can manipulate it or practice it.