Among the many questions that have occupied scholars of all historical periods for thousands of years, the question regarding the origin and evolution of matter is the most debated and far from having obtained a definitive answer. If we exclude the theories proposed by quantum physics, which are considered the most plausible, for the rest we are groping in the dark. In this article I’m going to try to give some answers, both on the mechanism of formation of molecules, and on their functional significance, without having the presumption of giving positive answers. It should be considered an invitation to discussion, a rational comparison, among those interested in the topic. In the article, I draw attention to an aspect, which I consider fundamental, and on which I have published several works. This is the mode of iteration, communication and recognition between molecules, which is the fundamental stage to obtain any materially detectable and significant result for the emergence of new entities. It is also the event that allows random evolution and without an apparent preordained or pre-established end. Even if the ultimate goal of this complex evolutionary activity is unknown to us, we cannot avoid seeking it.