From an evolutionary perspective, insulin resistance is not a design flaw, but a brilliant survival mechanism. In our ancestral past, food was scarce, and periods of famine were common. The ability to temporarily resist insulin allowed our bodies to preserve precious glucose for the brain during times of extreme stress or starvation. Today, however, we live in an environment of perpetual abundance. Our ancient survival machinery is overwhelmed by constant caloric availability, turning a life-saving adaptation into a modern chronic challenge.