In the context of this excerpt from “civil disobedience” by henry thoreau, what does the word posterity mean?

The difference between point of view and choice of person in a story is that "person" is the literary name given to main characters in a story, and "point of view" is the perspective from which we view the story "person" is part of a term used to describe the type of narrator (as in first-person or third-person); "point of view" is how the antagonist understands the events of a story the terms are interchangeable; there is really no difference between them "point of view" refers to the perspective from which the story is told; "person" is part of a term used to describe a type of narrator (as in first-person or third-person)