Eve of Destruction
1965
https://www.youtube.com/watch?v=h-V1t0PLQ2E
I remember that time well, pop love songs ruled, but Bob Dylan, Joan Baez, etc were beginning to get a cult following.
Then this song came out of nowhere and played everywhere eclipsing the ever popular love song theme. Changed history.
Interview with Barry McGuire.
https://www.youtube.com/watch?v=P0_gYNcvLxU