This article examines whether insurance is an appropriate mechanism for improving individual health or reducing the cost of health care for payers. The Affordable Care Act contains implicit standards for allocating responsibility for health, especially in provisions encouraging health promotion and wellness programs. A summary of the accumulating evidence of the effects of such programs suggests that wellness programs have been somewhat more effective in making people feel better than in reducing costs. Health promotion should be encouraged, because health is valuable for its own sake. Insurance is not well suited to improve health or manage behavioral risks to health; its tools are too crude to address the complex causes of chronic disease...