The development of the human society had also been the process of advancement on the understanding and utilization of resources.
In the beginning, resources were limited to raw material in the agricultural society, where the material was used to build production tools so as to improve the productivity. By the time the industrial age set in, various types of energy were included in the pool of resources, which were combined with the raw materials to build new types of tools.
When the modern era arrived, information became the "it-resources". Together, raw material, energy, and information had coalesced and infinitely broadened the scope of social productivity.
