Traditional Asian Medicine (TAM) views the body as part of the animal kingdom and subject to the rhythms of nature. Whether you believe in evolution or intelligent design, our bodies were developed to interact and be in sync with the natural world. Modern living tends to dramatically filter out nature and its associated rhythms. We modify our environment to fit our comfort with electric lights, A/C and heating, etc., leading to changes in sleep patterns and other lifestyle behaviors that are out of sync with nature. According to TAM, these disruptions in our biorhythms lead to disease.