In order to survive, man has to discover and produce everything he needs, which means that he has to alter his background and adapt it to his needs. Nature has not equipped him for adapting himself to his background in the manner of animals. From the most primitive cultures to the most advanced civilizations, man has had to manufacture things; his well-being depends on his success at production. The lowest human tribe cannot survive without that alleged source of pollution: fire.--Ayn Rand