It should be “people’s self-respect”. “Peoples’ self-respect” would only apply if the intent was to describe the self-respect of entire populations (the German people, the Spanish people, the German and Spanish peoples).
Normally, the apostrophe comes after the final letter in plural possessives (“girls’ dresses, horses’ hooves”). Since “people” is already a plural, the apostrophe goes before the “s” in the possessive. Similarly, you have “men’s magazines”, “children’s toys”, etc.
“I have one pet peeve and everyone does it even in speech, that’s saying something like ‘He took a picture of my friend and I.’ Shouldn’t that be ‘my friend and me’?”
Yes. You’d say “He took a picture of me”, not “He took a picture of I.” Adding “my friend” doesn’t affect the first-person object pronoun.
(I realize you directed your question to LibrarianInTraining, but I have a degree in English and experience as a copy editor, so I feel qualified to respond.)
“From what I remember of Doonesbury at the time of the Vietnam War, BD volunteered to join in order to get out of exams or a homework assignment or some such (he was definitely not drafted).”
He volunteered in order to get out of doing a term paper.
It should be “people’s self-respect”. “Peoples’ self-respect” would only apply if the intent was to describe the self-respect of entire populations (the German people, the Spanish people, the German and Spanish peoples).
Normally, the apostrophe comes after the final letter in plural possessives (“girls’ dresses, horses’ hooves”). Since “people” is already a plural, the apostrophe goes before the “s” in the possessive. Similarly, you have “men’s magazines”, “children’s toys”, etc.