Think of Human Giver Syndrome as a virus whose only goal is to perpetuate its own existence. You were infected with it as soon as you were born, inhaling it with your very first breath. And, just as the rabies virus makes dogs aggressive and bovine spongiform encephalopathy makes cows “mad,” Human Giver Syndrome changes human behavior in order to perpetuate itself—even if it kills the host (that’s us) in the process.