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.
Synchronicity II "Synchronicity II" is a song by the Police, and the third single from their album "Synchronicity". Written by lead singer and bassist Sting, it was released as a single in the UK and the U.S. by A&M Records, reached No. 17 in the UK Singles Chart and No. 16 on the "Billboard" Hot 100 in December 1983. It featured the non-album track "Once Upon a Daydream" on the b-side. The song was described by "People Weekly" as "aggressive" and "steely."