Directed by Tony Perri. With Bill LeVasseur, Michelle Tuttle, Roxy King, Don Kraus. A revolution of good deeds positively changing the planet. In a groundbreaking experiment, researchers at the National Institutes of Health have discovered that humans are hard-wired to be unselfish. During functional MRI brain scans, scientists learned that altruism makes people feel good, lighting up a primitive part of the human brain that usually responds to food, receiving money, and even…