Since 1938 researchers at Harvard University have been following 724 men as part of a study to determine what key factors lead to heathy, happy lives. It is the longest-running study of its kind in history. Based on their findings and results from other sources of related research, the researchers formulated 36 questions to help people consider and discuss ways to deepen their current relationships, cultivate meaningful new ones and possibly discover ways to live a happier life. The study reports: "Close relationships ... are better predictors of long and happy lives than social class, IQ or even genes." Robert Waldinger, the study's director, told Forbes magazine: "Good relationships keep us happier and healthier. Period."