Most of us seek a partner, for life or at least for a while. But how do we choose? After all, we meet hundreds, even thousands, of people in the course of our daily lives. What makes two people pick one another from among the myriad available candidates? Psychological science has long been trying to answer this question, and with considerable success.
Two main theories have guided scientific thinking on the subject. First is evolutionary theory, which claims that behavioral tendencies, physical characteristics, and personality features that promote our chances to survive and reproduce become, by that virtue, desirable to us. In addition, biological and anatomical differences between organisms will dictate different optimal solutions to the same problem. For example, if two animals, one with nimble feet and the other with strong wings, encounter a hungry predator, how will they deal with the survival threat? Most likely, the first animal will run away and the second will fly off.
