This is a concise account explaining in easy to understand terms how humans and all other life arose from bacterial ancestors that first populated the Earth nearly four billion years ago. The scientific grounding is kept brief and to the point, while enabling a step-wise comprehension of the entire story. It is backed up by numerous web references that can be used to get more information on a particular section of the narrative. If you have a desire to understand how our human family emerged from microscopic beginnings, this volume enables you to satisfy that curiosity.