
HEART DISEASE: REMAINS U.S. TOP KILLER Heart disease has consistently held the grim title of the leading cause of death in the United States for decades, outpacing all other single causes. Even in 2020, as COVID-19 surged to become the third leading cause, heart disease remained at the top, followed by cancer. This highlights the relentless nature of chronic disease in humans, even when a pandemic dominates the headlines (JAMA). When you factor in stroke, which usually ranks fourth or fifth depending on the group, cardiovascular diseases cause an enormous share of deaths every year. Some studies have even argued that medical error could be the third leading cause, though this depends on how deaths are counted and is still debated (BMJ). Here’s the part that matters: many of these deaths don’t have to happen. The CDC points out that many fatalities from the five major causes—heart disease, cancer, chronic lung diseases, stroke, and unintentional injuries—are preventable with bette...