I'm going through Outcomes Advanced Workbook and in chapter 2 there's a text about Cinderella with the following sentence:
Folk literature abounds with tales of the poor underdog who makes good, and Cinderella echoes this well-established theme.
I'm trying to understand why a definite article was used in "the poor underdog" instead of "a poor underdog" - after all, we're not talking about any specific underdog, are we? If the author had written "a poor underdog" instead, how would that have changed the meaning?
As a bonus question, could no article + plural (as in "tales of poor underdogs who make good") be used here? Would it make any difference, other than stylistic?