Language allows info to rapidly pass from one person to another. This exchange of data allows millions of people to adapt rapidly and together to sudden environmental changes. Complex behaviors that are sometimes necessary for survival are learned simply by listening to other people speak. The transfer of info, and thus of ideas, is a much faster way of passing data than that based on genes. In fact, for other animal species the process is long and they have to adapt over generations to a new environment through a process of selection. Every day all over the world the miracle repeats itself and most two to three-year old children start speaking the local language. They will not have to wait to have children to transfer info about the environment where they live.