The work encompasses two subject areas which have attained great meaning for various sciences and humans as well: evolution and sexuality. First, I will lay down the foundation of evolution, a process on which the emergence of the world and the subsequent developing living human beings is based upon. The subject will be societal and cultural change in society from its beginning until the present, and I will take a closer look at the growing meaning of an orientation toward the future. I will then apply the general views of Function Systems to intimate relationships. In the end I will take a look at forthcoming development, such as the increasing separation of sexuality and producing offspring and the effects on family and reproduction.