Since the end of the XIXth century, the influence of learning on natural selection has been considered. More recently, this influence has been investigated
using computer simulations. However, it has not yet been shown how the ability of learning can be the product of natural selection.
This point is precisely the subject of this paper.
Samuel Delepoulle acknowledges the support of the “Conseil Régional Nord-Pas de Calais, France”, under contract n 97 53 0283