the song is in truth about a metoride or commit colliding with earth, however (i think) the song is ment to be taken metaphorically, the word "worlds" can mean planets and metors, but also can refer to differant groups of people. when thinking of it like this an example of when two worlds collided was when The Catholics and the Prodistants crossed paths, resulting in the crusades etc.
the song is in truth about a metoride or commit colliding with earth, however (i think) the song is ment to be taken metaphorically, the word "worlds" can mean planets and metors, but also can refer to differant groups of people. when thinking of it like this an example of when two worlds collided was when The Catholics and the Prodistants crossed paths, resulting in the crusades etc.