I cannot answer the point about the Lugiones, seeing as I am not a member of the mod team.
I (and correct me if I'm wrong) do not say that a cooling period occurred in the Late Bronze Age, that led to an increased pastoralism due to a reduction of viable agricultural sites. I would even argue that the opposite happened, at least for temperate climates South of the great mountain ranges (Pireneus, Alps) and that this period coincides with a development of agricultural surplus, thus boosting commercial capabilities and leading to more complex societies in indigenous tribes (this is especially true regarding the Iberian Peninsula, but could also be applied to other places that had no interaction with more complex societies such as the Hellenes or the Phoenicians).
Regarding large-scale cereal farming in North-Western Europe, I recall reading that only after the great deforestation and draining efforts of the Northern regions of Europe (Belgica, Germania, Saxony) that started c. 8th century A.D was the extensive and intensive cultivation of cereals introduced in those regions. But again, don't quote me on this, as I may be embarrassingly wrong![]()
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