"Save the Population" is a Red Hot Chili Peppers

Red Hot Chili Peppers

Red Hot Chili Peppers is an American rock band, formed in Los Angeles in 1983. The group's musical style primarily consists of rock with an emphasis on funk, as well as elements from other genres such as punk, hip hop and psychedelic rock...

' song from their 2003 Greatest Hits

Greatest Hits (Red Hot Chili Peppers album)

Greatest Hits is the second compilation album by the Red Hot Chili Peppers. It was released on November 18, 2003 by Warner Bros. Records. Aside from their cover of "Higher Ground", all songs on the compilation are from their tenure on Warner Bros...

album. It was chosen with "Fortune Faded

Fortune Faded

"Fortune Faded" is a song by the Red Hot Chili Peppers. It was released in 2003 as a single, to coincide with the release of their Greatest Hits album. The song, along with "Save the Population" , was recorded at The Mansion and produced by Rick Rubin...

" for the compilation. The track itself is the last of the album.

Despite belief to the contrary, the song was never commercially released as a single. A CD single of the song was made and released in Japan and Spain, but at no point was the song eligible for the charts.
The song is about the singer, Anthony Kiedis, asking his loved one to stay the night with him, so they can have a child of their own, hence the name 'Save the Population'.