Enzo Tiezzi was a full professor of Physical Chemistry at the University of Siena and author or co-author of five other books in the field of sustainability published by WIT Press (The End of Time, The Essence of Time, Beauty and Science, Steps towards an evolutionary physics, and City out of Chaos) , as well as some 500 articles published in major scientific journals.

A former Fulbright scholar, he was a member of the group of 25 scientists, who developed the concept of "sustainable development", first in Stockholm and Barcelona, then at the World Bank in Washington and, finally, at the ASPEN Institute in the United States. He also served as an editor of the International Journal of Design & Nature and Ecodynamics and chief editor of the WIT Press series The Sustainable World.

Santiago Hernández Ibañez has been a professor of bridge engineering in the Department of Civil Engineering at the Universidade da Coruña since 1993, where he is in charge of the aerodynamic wind tunnel. He has over 25 years of experience in teaching, research, and writing on structural optimization and has also conducted research on the aeroelastic design of cable suspension bridges. Hernández Ibañez has worked on the structural restoration of buildings of historical importance, including a number of well known churches.

Professor Hernández Ibañez is well known as a lecturer throughout Europe, Asia, and the Americas and has been a pioneer in structural engineering education in Europe.