Fear may very well be a caveman fear of the predator of the giant lizard chasing them - maybe that's what Steven Spielberg connects with so well in Lost World.
I tried the paleo diet which is the caveman diet - lots of meat. And I tried the calorie restriction diet: The idea is that if you eat very very little - if you're on the verge of starvation you will live a very long time whether or not you want to of course.
A father may turn his back on his child brothers and sisters may become inveterate enemies husbands may desert their wives wives their husbands. But a mother's love endures through all.