Intensification was certainly possible and technology was also available as this came at the end of the Bronze Age. That transition saw extensive climate change as well in various locales caused by disruption originating in the Atlantic.
Thus the rise of such a culture fits time and place. This is also the most likely culture for the taming and adaptation of the Camel.
Archaeologists reveal mysteries of ‘lost’ 3,000-year-old civilisation
ArchaeoHeritage, Archaeology, Breakingnews, Libya 6:00 PM The work of a University of Leicester archaeologist investigating a lost civilization in southern Libya will reshape the history of early Africa. Ground shot of a Garamantian fortified site (qasr) [Credit: © Trans-SAHARA project]