This book has many great merits: - First, that of democratizing the economy, this science often reserved for "elite" who think too often only able to understand and decide for all how to approach it; - Secondly, that of seriously question the impasse of perpetual growth in a finite world, on the basis of reasoned reflection, and a long journey through which we discover what could be a sustainable human society. Sometimes tedious, however, this book is very interesting, and should be read by all those who have questions on the economy, on society, on weight which is left to future generations (the latter is not much ink, proof that human intelligence has its limits).