As Spanish teacher for the 1967 PCV Training Programme in Logan Utah, changed my whole life goals from Architecture to Teaching, due to the process of transfering a lenguage tool to a group of young people, most of them older than myself, who were full of enthusiasm and ideals, eager to start their service in third world countries.
Three decades and half dozen years after, I recognize in the Sustainable Development Model, the same profile of motive powers that ignited the thousands of spirits of those who became PCVs.
The iniciative of transfering useful energies (in the physics language) from those systems (individuals) who can, to those who lack of them.