Have you ever looked for the root of production? Take a look at an
electric generator and dare tell yourself that it was created by the
muscular effort of unthinking brutes. Try to grow a seed of wheat
without the knowledge left to you by men who had to discover it for the
first time. Try to obtain your food by means of nothing but physical
motions--and you'll learn that man's mind is the root of all the goods
produced and of all the wealth that has ever existed on earth. Francisco D'Anconia, "Atlas Shrugged," Ayn Rand