John Lennon immersed himself in political activism from 1969 until 1973 or so. It began with his returning his MBE in protest of Great Britain's support of the War and the Bed-Ins For Peace in 1969. When he arrived in New York City in 1971 he found himself at the center of it all. His addictive nature led to his involvement with contemporary protests like women's liberation, Attica, marijuana possession laws and the United States government's treatment of The Black Panther Party.
Sometime In New York City did make a bold statement in 1971. John Sinclair, Angela Davis, Attica State Prison, and the Women's Liberation Movement where memorialized in this album. I wish Yoko had less on this album than she did.
Yeah, it was the political period of John and not his best years I think. When John arrived in the US he got strongly surrounded and influenced by the radical left activists, which was the main reason for the problems he got with the US government.