This book contains an in-depth and up-to-date chronicle of historical, archaeological and paleoclimatological events over the last 15000 years. It examines history through a lens that’s tuned to a general progression of events that repeat every 900 years. Using a quantitative and comprehensible approach, this book shows that our planet has gone through repeated millennial-scale oscillations in climate and that human societies have mostly prospered during warmer times and struggled during cooler times. It provides an overview of factors that affect global climate over a variety of timescales and includes chapters on the greenhouse effect, ice ages and future predictions. The 900 Year Climate Cycle expounds a new way to think about humanity’s experience on this planet.