The Mayans were a powerful civilization in the past, but they collapsed and abandoned their own cities. Theories have been developed to try to understand what happened to the Mayans and one theory might simply predict what will happen to our societies if the Earth's temperature continues to rise. The drought theory of the Mayan Collapse posits that a severe drought struck the Yucatan Peninsula. Thin tropical soils lacked the fertility to grow crops, causing famine, disease, and war in the basic drought cycle of the Maya. This theory can be explained by both environmental and cultural factors of Mayan society. As scientists study the global climate change currently occurring, more and more evidence is being explored on climatic, historical, hydrological, tree ring, volcanic and geological factors. The lack of food and water could have caused a situation of extreme upheaval in their society, leading to revolts and making them vulnerable to invasion. Throughout history, droughts have caused the fall and collapse of many powerful civilizations. Climate change is causing droughts around the world and, like the Mayan theory of drought, it's all happening quickly. Humans must learn to live in a warmer world that will bring severe droughts and change the entire Earth. Solutions to global climate change continue to be tested and most of them relate to carbon.