What has driven the evolution of Homo sapien and the civilizations it created ? Our first response may be biology and ingenuity. But how much has been guided by the natural environment and the opportunities made available by resource recognition? We will learn about the geography of the earth's geologic, climate, plant and animal evolutions and ponder how the environment provided opportunities for exploitation and limits to development. We can consider how different we and our civilizations might have turned out, had Mother Nature provided a different stage, but we are stuck with the one she did provide and will debate the extent to which our fate was sealed by that stage.