How Could Ancient 'Boat People' Unfold Their Civilization in Palestine?

[JackDempsey]

The "Peoples of the Sea," we're told, were the embodiment of many-leveled turmoil at the end of The Bronze Age, virtually "living on their boats" as Egyptians said. Yet once planted in Palestine, they unfolded advanced agriculture, metallurgy, astronomy and new city designs. How did they do it? Can you carry it all within, or would you have to have (undiscovered) living-places where these things went on in the midst of their "wanderings"?