To what extent is the uncivilized side of boys revealed in the sow hunt, creation of Lord of Flies, treatment of conch, and desire for meat and...

This question is way too specific, and if we answered
every part of it there would be nothing left for you to reflect upon and write.  I will
spend a little time reviewing the uncivilized behavior of the boys in Lord of
the Flies.  There is one group which is closer to "civilized" than the other,
and that's the group which stays with Ralph.  It's Jack's group, the hunters, which
demonstrates little restraint when it comes to the darker side of their human nature. 
They're selfish and don't care about maintaining the fire or helping around the camp. 
They, and Jack in particular, feel no need to obey the rules of order established early
on and symbolized by the conch.  They are mean and self-absorbed and becoming wilder by
the page.  Their clothes are nearly gone (by wear as well as by choice) and they've
begun painting their faces for the hunt. Behind their masks, these boys are able to act
in ways which are generally unacceptable and certainly could be called uncivilized. They
only want to hunt, and they're getting more savage (as demonstrated by their sacrifice
to the Beast in the form of a pig's head) each time they hunt.  The rules are gone, and
so is their self-restraint.  You can certainly find those events in the chapters and
pages you list.