It’s easy to talk about the circular economy. The moment waste is recycled, we start talking about the circular economy. Such statement, to be fair, can be defined as superficial. The apparent simplicity of the production of goods, together with massive availability of raw materials that has characterized the whole industry up until now, has led us to regard recycling as an equally simple activity. But this approach is wrong. Instead, production chains, considering just the manufacturing aspect, are very complex, stratified and rational, and their complexity soars when they attempt to close the cycle using secondary raw materials as resources. Indeed, the cycle loses its rationality when the complexity contained in the product meets the sociological one of the use and ...