Gates began his speech by confessing his biggest regret about leaving Harvard: he departed with no real awareness of the appalling inequities in the world—the disparities of health, wealth, and opportunity that condemn millions to lives of despair. He had learned about economics, politics, and scientific advances, but not about how those advances could be applied to help the most vulnerable. This led to what Gates called the central insight of his life's work: that humanity's greatest advances are not in its discoveries, but in how those discoveries are applied to reduce inequity. He placed the struggle for equity alongside democracy and education as the defining measure of human progress, framing it not as charity but as civilization's highest calling.