WALT WHITMAN WAS A NURSE IN THE CIVIL WAR AND EXPERIENCED THE PAIN .

THERE AREN'T ALWAYS EXTRAVAGANT CHARACTERS, THEY MAY BE ORDINARY.

MARK TWAIN IS FAMOUS FOR ADVENTURES OF HUCKLEBERRY FINN, WHICH IS KNOWWORLDWIDE.

NATURALISTS TRY TO UNDERSTAND THE HUMAN MIND AND REALISTS DEAL WITH ORDINARY PEOPLE.