\'The myth of Celtic and Roman Britain\'

[Phaichtos]

A connectedness among the coastal peoples facing the Atlantic seems perfectly reasonable, whether it actually happened or not is less certain. There's certainly circumstantial evidence.

Fair enough! I do have to say though that I could certainly imagine it being much, much easier for Atlantic Europeans to stay in periodic contact with one another than it would be for their brethren deeper into the continent's interior. Even the Romans absolutely preferred doing trade by ship as opposed to overland whenever at all possible, and they nevertheless built an expansive road network much of which is still extant today . Travel overland was simply too dangerous and time consuming for most ancient folks to be bothered with, it seems.