3. (What’s so Funny About) Peace Love & Understanding (1978) • Elvis Costello
Costello himself has admitted this song actually started out as a joke but he began taking it seriously as the hippie movement was coming to an end and he recognized he may be the last one passing on this nugget of wisdom.

4. Turn! Turn! Turn! (To Everything there is a Season) (1965) • The Byrds
Turn! Turn! Turn! was actually written by Pete Seeger and is based on a passage from the book of Ecclesiates.