Who are the first kinds of people that will not survive in an uncivilized or savage environment? How does this fit Piggy?in Lord of the...

If you are put down in an uncivilized environment, I think
that you have two ways to survive.  First, you can, yourself, be strong physically and
mentally.  Second, you can induce people who are strong to be your friends/allies -- you
can convince them that you are in some way valuable to
them.

Piggy does not fit either of these categories.  Of
the characters that we are really introduced to, he is by far the least strong.  He has
his asthma, he is fat, he seems like he is emotionally pretty fragile.  With these
traits, he surely will not thrive on his own.

Secondly, he
does not have a personality that will allow him to seem useful to those people who do
have the power.  He has the kind of weak personality which (along with his physical
shortcomings) seems to invite abuse and hatred from strong
people.

So Piggy is not strong enough to survive and he
lacks the attributes that would allow him to become part of the tribe that gathers
around a truly strong savage person.