Is it possible to define what it means to be human based on biological, social, ecological, or cultural factors? Is it something physical, something in the way we think, or in the way we behave? When we look at the long history of humankind, it becomes clear that we had to experience many different developmental stages throughout the millions of years of developmental history to become the multifaceted species that populates this Earth today.English Edition of: "Menschsein. Die Anfänge unserer Kultur"