In this first quarter of the 21st century, many alternatives are developing that redefine how we live, work, learn and play. We are exploring new ways of designing our cities, communities and homes, which encourage concern for the common good in all aspects of daily life. Maximizing resources and minimizing excessive consumption along with the growing tendency to share and reuse materials and services is provoking a radical change, contributing to the emergence of a more rational society that embraces conservation, regeneration and the collective well-being as its core values.