Can jealousy be useful for relationships? We know many stories where one partner wears the other down with jealousy, and we think we need to get rid of it. But not everything is so simple, says internationally known psychotherapist Robert Leahy. Jealousy indicates that the relationship is important and valuable to us. Leahy offers a more subtle understanding of the phenomenon of jealousy. In this book you will learn the evolutionary origins of jealousy and why it is needed for modern people. We often feel jealousy because we fear losing the people who matter most to us. And jealousy can help your relationships as well—not just harm them—once you master effective skills to keep it in check.