one half of the world does not know how the other half lives

one half of the world does not know how the other half lives

People cannot fully understand the lives of others, especially when their lifestyles are very different. I don't understand how people are just oblivious to the growing homeless population in our city. Truly, one half of the world does not know how the other half lives.
See also: does, half, how, know, lives, not, of, one, other, world