A historian of science examines key public debates about the fundamental nature of humans to ask why a polarized discourse about nature versus nurture became so entrenched in the popular sciences of animal and human behavior. Are humans innately aggressive or innately cooperative? In the 1960s, bestselling books enthralled American readers with the startling claim that humans possessed an instinct for violence inherited from primate ancestors. Critics responded that humans were inherently loving and altruistic. The resulting debateÑfiercely contested and highly publicÑleft a lasting impression on the popular science discourse surrounding what it means to be human. Killer Instinct traces how Konrad Lorenz, Robert Ardrey, and their followers drew on the sciences of animal behavior and paleoanthropology to argue that the aggression instinct drove human evolutionary progress. Their message, spread throughout popular media, brought pointed ripostes. Led by the anthropologist Ashley Montagu, opponents presented a rival vision of human nature, equally based in biological evidence, that humans possessed inborn drives toward love and cooperation. Over the course of the debate, however, each side accused the other of holding an extremist position: that behavior was either determined entirely by genes or shaped solely by environment. Nadine Weidman shows that what started as a dispute over the innate tendencies of animals and humans transformed into an opposition between nature and nurture. This polarized formulation proved powerful. When E. O. Wilson introduced his sociobiology in 1975, he tried to rise above the oppositional terms of the aggression debate. But the controversy over WilsonÕs workÑled by critics like the feminist biologist Ruth HubbardÑwas ultimately absorbed back into the nature-versus-nurture formulation. Killer Instinct explores what happens and what gets lost when polemics dominate discussions of the science of human nature.

Dangerous. Ruthless. Savage. And she's the good guy. Abby Sinclair had a desperate childhood until she was rescued and adopted by a retired army ranger who molded her into a master of self-defense. Now, she's a cunning and fearless assassin thrust into assignment after dangerous assignment, using everything she has-nerve, resilience, strength, sex-to come out on top. Her only rule: trust no one. Abby's latest assignment is in Columbia: go undercover and snuff out a dangerous arms dealer active in the underground sex trade. But when Abby purposely blows her cover in a last-ditch attempt to free the helpless victims, deadly mercenary Kane Woodland is recruited as back-up. His mission: get Abby out of that hell hole. The last thing Kane expects is to feel a primal attraction for Abby. But when she convinces him to join her on her perilous mission, their newfound passion could put the lives of their whole team at risk.

Jason Steadman is a thirty-year-old sales executive living in Boston and working for an electronics giant, a competitor to Sony and Panasonic. He's a witty, charismatic guy who's well liked at the office, but he lacks the "killer instinct" necessary to move up the corporate ladder. To the chagrin of his ambitious wife, it looks as if his career has hit a ceiling. Jason's been sidelined. But all that will change one evening when Jason meets Kurt Semko, a former Special Forces officer just back from Iraq. Looking for a decent pitcher for the company softball team, Jason gets Kurt, who was once drafted by the majors, a job in Corporate Security. Soon, good things start to happen for Jason—and bad things start to happen to Jason's rivals. His career suddenly takes off. He's an overnight success. Only too late does Jason discover that his friend Kurt has been secretly paving his path to the top by the most "efficient"—and ruthless— means available. After all, as Kurt says, "Business is war, right?" But when Jason tries to put a stop to it, he finds that his new best friend has become the most dangerous enemy imaginable. And now it's far more than just his career that lies in the balance. A riveting tale of ambition, intrigue, and the price of success, Killer Instinct is Joseph Finder at his best. *San Francisco Chronicle ** Pittsburgh Post Gazette

Charlie Fox was no good at being the nice girl her parents wanted, so she joined Her Majesty s military and acquired a new set of skills. Now she puts them to use teaching self-defense to battered women in a refuge passing on the finer points of roundhouse kicks, running like hell, and breaking a cheekbone when necessary. Her skills come in even handier when she takes a job working security at the Adelphi, a hot new club with an enigmatic owner. And they come in handiest of all when a rapist appears to be targeting the desperate women at the refuge, and someone with a very nasty line in knife-work appears to be targeting Charlie s friends."

Frank Aaron is a police officer who struggles with the curse of being a werewolf. As he investigates the brutal murder of the Mayor''s family, he notices claw marks, saliva, and animal hair at the crime scene, leading him to wonder if he might be responsible. But in the course of his investigation, he discovers that there is another werewolf in town, and he''s forced to use the abilities of his feral side to track down his counterpart and solve the mystery of the murder.