Climate change greatly
affected the food sources in The Paleolithic Age. As hunting and gathering was the main source of feeding,
due to climate and environmental changes there were no food sources left
because they either started getting extinct or moving to other areas causing
the hunters and gatherers also to move from an area to another.
The reason why the king of Arcadia is angry when Atalanta is born is because "A. Atalanta is a girl, and the king wanted a son," which is why she's initially left on a mountaintop to die.