LOTF response

[Piggy:] "I don't agree with all Jack said, but with some.  'Course there isn't a beast in the forest.  How could there be?  What would a beast eat?"
"Pig."
"We eat pig."
"Piggy!"
"I got the conch!" said Piggy indignantly.  "Ralph--they ought to shut up, oughtn't they?  You shut up, you littluns!  What I mean is that I don't agree about this here fear.  Of course there isn't nothing to be afraid of in the forest.  Why--I been there myself!  You'll be talking about ghosts and such things next.  We know what goes on and if there's something wrong, there's someone to put it right."
He took off his glasses and blinked at them.  The sun had gone as if the light had been turned off. [...]
"Life," said Piggy expansively, "is scientific, that's what it is.  In a year or two when the war's over they'll be traveling to Mars and back.  I know there isn't no beast--not with claws and all that, I mean--but I know there isn't no fear either."
Piggy paused.
"Unless--"
Ralph moved restlessly.
"Unless what?"
"Unless we get frightened of people." (83-84)

This paragraph begins with the obsession with pigs that we see so many places in Lord of The Flies. Pig. Pig. Piggy! But then it goes much deeper than that. Piggy and Ralph show another obsessiveness: the obsession with rules. "I got the conch!...Ralph, they ought to shut up, oughtn't they?" They need those rules for anything and everything to work, so when one of them is bent, they think that all heck will break loose. 
Then Piggy says that "life is scientific," and that he knows there "isn't no beast," which can mean several things. It could mean that he doesn't think the beast exists, in any way, shape, or form. It could mean that he doesn't think that the beast is a physical beast, and that this "beast" is just a concept floating around. (Similar to Simon's views.) Connecting this with earlier passages, I'm not sure which one. It seems like the latter when Piggy says, "Unless we get frightened of people." But in an earlier passage, it seems like the former when Piggy calls Simon "batty" for suggesting that the beast could be within the boys.
"Ralph moved restlessly." Is he restless because he's nervous, or because he's bored. Ralph could agree with Piggy, and Ralph could not agree with Piggy.Ralph and Jack's relationship notwithstanding, it is difficult to place where Ralph lies with this whole "beast ordeal" at the time of this scene.