What song does Ozzy refer to in his song "Dreamer"  that was written by John Lennon, that encourages a world at peace?
Imagine (John Lennon song) "Imagine" is a song written and performed by English musician John Lennon. The best-selling single of his solo career, its lyrics encourage the listener to imagine a world at peace without the barriers of borders or the divisions of religion and nationality, and to consider the possibility that the whole of humanity would live unattached to material possessions.
No Church in the Wild "No Church in the Wild" is a song by American hip hop artists Kanye West and Jay Z from their first collaborative album "Watch the Throne" (2011). It is the first track on the album and features vocals from Odd Future's Frank Ocean and The-Dream, although the latter is uncredited for his contributions to the song. The song explores themes of religion and decadence. The track received highly positive reviews from music critics, who praised Ocean's vocal hooks, the depth of the verses, the cinematic production and the song's power as an opening track.