It is some 900 years before Christ that we find the most ancient traces of two innovations which were to have incalculable consequences for the future of mankind. The evolution of civilization has, in fact, been marked by a clean break located at the era when man discovered the rudiments of agriculture and animal husbandry and began to produce his own food. Whereas for the three million years during which he had to provide for his needs exclusively through hunting, fishing and gathering, his progress was extremely slow, the adoption of a new way of life based on agriculture and animal husbandry allowed man to transform himself in less than twelve thousand years from deer hunter into astronaut.