Well, basically he theorizes that once upon a time there was an ancient, unknown and advanced civilization, that spread all around the world and left behind the ruins we see today.
I'm not saying that's not plausible or possible, I'd love if it'd be so, but sometimes he goes too far in his speculations.
If you search here on UM for him, you'll find plenty of infos (and detractors )
I have plenty pictures of those Suhozid which means Drywall.
You mean that they use gravity as their benefactor? But we seen in Greece pyramid and wall with smaller stones as well...Also so called curved Etruscan tombs have small polygonal stones.
Dry walls is the very first form of building structures. It's not used exclusively with huge stones; of course it's used also with small ones. It depends on the purpose: if you want to build a wall 10 meters high with only stones and no mortar and that must resist and defend your city and family, would you prefer to use small or big ones?
Even today here there're walls build with this technique and small stones, but, as you wrote, they serve as borders between lands, they're quite decorative. We don't have to forget that things usually have a purpose and that, especially in old times, people didn't do things "just because" (like many times we do today), but they had a specific reason.
About Swastika, I was thinking more on Carl Jung's subconscious archetypes.
Well, maybe I'm a bit too extreme and semplicistic, but to me both Jung and Averroes ideas derive from Plato and his Hyperuranium (or World of Ideas).
I've never wrote such a thing.
We have to separate Troy from Minor Asia. For the moment, I don't link anything historycal with Troy, as far as we can't be sure if it really existed and where it was located. Do you know that there's a theory stating that Iliad and Odissey were located in the Baltic Sea and thus they tell about the period when the old Greeks lived there, before moving south (and I have to say that it's quite covincing)?
I don't exclude that some civilization came from Minor Asia to Italy.
I'm only saying that, as far as research goes on, it seems that Veneti came from central Europe and not from Minor Asia.
As far as I know Messapians were Illyrians, and viceversa.
An alien help!
Frankly I don't know what to say at the moment, I didn't study it throughly. Surely it's fascinating and raises many questions.
I don't discard the forgotten advanced civilization theory.