Naturopathy views the body as a self-preserving form that tries to heal itself. Diseases and illnesses are viewed as natural responses of the body to harmful stimuli and lifestyle. Naturopaths seek to find the underlying causes of imbalances that lead to disease and prescribe various therapies for returning the body to a state of homeostasis. Naturopathic medicine integrates traditional natural therapeutics - including botanical medicine, clinical nutrition, homeopathy, acupuncture, traditional oriental medicine, hydrotherapy, and naturopathic manipulative therapy - with modern scientific medical diagnostic science and standards of care. Medical practitioners from various natural therapeutic disciplines founded it as a formal healthcare system at the turn of the century. By the early 1900s, more than 20 naturopathic medical schools existed and naturopathic physicians were licensed in most States. Today there are more than 1,000 licensed naturopathic doctors in the United States. The degree of Doctor of Naturopathic Medicine (N.D. or N.M.D.) requires four years of graduate level study in the medical sciences.