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.
But in answer to your question about the conspiracy angle, I think that any historian worth his salt, and this is where I fault Stephen Ambrose and a lot of these guys who attack me - not all of life is a result of conspiracy by any means! Accident occurs...
I do believe that movies are subject to a million interpretations.
Source: brainyquote.com