“Your sweetheart calls you by another's name. His eyes linger too long on your best friend. He talks with excitement about a girl at work. And the fire catches. Jealousy - that sickening combination of possessiveness, suspicion, rage, and humiliation - can overtake your mind and threaten your very core as you contemplate your rival.”

American anthropologist, human behavior researcher, and self-help author

Helen Elizabeth Fisher was an American anthropologist, human behavior researcher, and self-help author. She was active in the late 20th and early 21st centuries, and is known for her work on human behavior and relationships. Fisher was a biological anthropologist and served as a senior research fellow at The Kinsey Institute of Indiana University. She was also a member of the Center for Human Evolutionary Studies in Rutgers University’s Department of Anthropology. Before that, she worked as a research associate at the American Museum of Natural History in New York City.