"render unto Caesar...?"

"Render unto Caesar the things which are Caesar's, and unto God the things that are God's"

I think there is a differentiation between this world and God's kingdom of Heaven.

I don't think that Christ teaches that there is or that there will be equality in this world and I do not believe that contradicts the belief that people are equal in the eyes of God.

The "ruler of this world" is Satan after all.