While medical innovations and public health gains in the past century have been measurable in leaps and bounds, significant progress against acute disease has revealed an equally enormous challenge—chronic disease on an unprecedented scale. Close to half of Americans have chronic conditions and 1 in 4 have more than one. They cause 7 out of every 10 deaths and cost our country 75 cents of every health care dollar. With chronic disease prevalence growing at a faster rate than the population as a whole, the forecast is daunting.