Dear Dr. Farr,
Although communication is a property or characteristic of all living beings (some insist that the so-called non-living things such as crystal, metal, earth, air, fire etc. communicate as well in unique ways with living beings!), human beings are probably unique in their ability and even inherent urge and propensity of communicating their thoughts and emotions through languages, verbal, non verbal (sign language) etc. Animals lower on the Darwinian scale, another highly-charged area which can at times get quite noisy;-), do visibly communicate their emotions!
So, I have no feeling of surprise or shock that ancient cultures communicated. Whatever the gradient of flow of information was is somewhat immaterial! But what amazes me is that with travel times being what those must have been, before relatively faster means such as ships and boats etc, even back *then*, individuals if not masses and throngs (like today) contacted distant places!
Globalization, or at least the move towards that is indeed not a new idea, but an ancient inner drive and ambition of human beings!
Regards,
Rohiniranjan