Sensible. In Chapter 11, Ralph tries desperately to start the fire that has gone out. When he approaches Jack to ask him to return Piggy's glasses, he tries to be reasonable, but Jack goads him and Ralph attacks Jack. However, Piggy grabs the conch and the others quiet down. Piggy asks,
Which is better--to be a pack of Indians like you or to be sensible like Ralph?...Which is better--to have rules and agree, or to hunt and kill?
At one point Ralph has reflected that Piggy is the thinker and the most rational of all, and he admires Piggy's devotion to the rules of society because he knows these are what hold together the fabric of civilization. Even though Ralph loses control of the hunters, it is he always who insists upon the smoke of the fire being essential to the boys' rescue.
In the final chapter, when the naval officer arrives and saves Ralph from the harm intenede him by Jack and the others "Cos I had some sense," it is Ralph who identifies himself as the one in charge, and he tries to explain that the boys cooperated well at first. Then, he thinks of the loss of the beauty of the island and the innocence of the boys,
Ralph wept for the loss of innocence, the darkness of man's heart, and the fall through the air of the true, wise friend called Piggy.
Sensibly, Ralph realizes what has been lost by all the boys. Reflecting as none of the others have, Ralph sees that the rationality of Piggy is the only way for the boys to have survived.