As the author points out in this book, the quickest way to receive a diagnosis of prostate cancer is to undergo screening; the same concept applies to many other illnesses and diseases. With the advent of the technological age, doctors are now able to see more than before and, therefore, are quicker to diagnose diseases and tumors early. As Welch explains, the problem is that not all diseases or cancers kill you; some tumors will stick around, but will never cause any harm. So, this leads to screening for cancers that would never have killed a patient, which end up being detected early and treated, thus giving credence to early screening as a success story. As Welch explains, most illnesses and injuries that follow a natural course of events, without medical intervention, usually heal on their own. This is problematic because it creates the idea that medical intervention is helpful and necessary, when this is not always the case. Overall, as a society, the benefits of medical care have been overly exaggerated, while the harms of medical care have been largely ignored. If Welchs' instructions were followed, the new medicine would be a more careful examination of the effects of screening and testing