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.
Woman Is the Nigger of the World "Woman Is the Nigger of the World" is a song written by John Lennon and Yoko Ono from their 1972 album "Some Time in New York City". Released as a single in the United States, the song sparked controversy at the time due to its title and subject matter.