This is due to warmer climates that are closer to the equator and therefore having a higher likely hood of there being more swamps closer to the equator.
Answer: Old Major is absolute in his hatred of Man, as Lenin was uncompromising in his views. Lenin was responsible for changing Russia into the U.S.S.R.
Old major's speech about evils of human rouses the animals in rebelling and philosophy on the tyranny of man.