Those four words make you believe this song is about Marxist and communism? And you have the nerve to TELL ME TO THINK LOGICALLY? LMAO!
Imagine no possessions
I wonder if you can
No need for greed or hunger
A brotherhood of man
Imagine all the people
Sharing all the world
...have a communist bent to them. The rejection of God and religion at the beginning and the verse I just posted come across that way.