As hunter-gatherers, people had to move accordingly to their food source. If animals choose to stay in a certain area, humans have to move accordingly to the situation. Post agricultural revolution, humans still relied greatly on the environment as it has become necessary. The act of humans planting what is most suitable to the environment is also conforming to the rules of nature. As people were reliant on natural environment, they were also vulnerable to natural events. Before the agricultural revolution, it was more difficult to find food in certain seasons. However, as climate began to get warmer and wetter at the end of the last Ice Age, agricultural revolution was able to take place. Although humans could control what they grow on their land, the weather may not work in their favor. Natural events, such as floods, are