Winston The Last Man
O'Brien calls Winston the last man because Winston is the only person besides him that understands both worlds but chooses to be good. The reason i say that because others that understand both worlds chooses to have power instead of doing what is right. The reason why others are not called the last is because others do not understand both worlds, they just understand the very strict one, They also believe everything they see and hear. That is why they are not called the last ones like Winston. Winston is very unique and that is why he trying do what he can to change things.