In the distant past, Elves were industrial. As in relatively high levels of technology (petroleum, coal, steam power). Having long lives, however, they began to see (and predict) what they were doing to the environment, which, to them, was an aspect of the Eternal, and thus sacrosanct. They were destroying the very thing they revered, and it shocked them to the core. Thus began the Atacoivië, or "Reawakening", an ultimately successful social engineering project which saw the Elven retreat from high technology and a renewed embrace of pastorialism. While they still refine their techniques in plant breeding and the magical arts, they have forsaken the false allure of higher technologies. The knowledge they had is not lost; it is hidden away, used primarily as a source of what knowledge to look out for and to cull when necessary. The responsibility of this is given to a small group of watchers called the Ministry of Serendipity. It is their job to watch out for, and protect from, the dangers of high technology. And yes, that means that they are actively preventing certain inventions from being made. This group is highly secretive, even from other Elves; most Elves have no clue they exist. Other races have absolutely no clue they exist. They work in very subtle and secretive ways.