Human Sacrifice examines the history of human sacrifice from around the globe. Each episode will explore historic and archaeological evidence, from the prehistoric era until the practice died out - or did it? We will see what the ancients said about human sacrifice, and ask overarching questions about the existence and reason for the practice. Why did a culture turn to human sacrifice? What were the constants in each religion, and what were the differences? And finally, are the ancient sacrifices around the world long gone, or are we experiencing a re-birth of ritual killings?