“Dime con quien andas, y te dire quien eres.” This popular Spanish expression translated into English says, “tell me who you’re walking with and I’ll tell you who you are.” The question is: can you? Does a person's environment play a role in their personality and behavior in life or is it innate? Since philosophers like Plato, Aristotle, Hermes and even Socrates, there have been great debates about whether we, as humans, are born wired in a certain way or whether we become products of our environment . This argument, commonly referred to as Nature versus Nurture, continues to be a topic of debate among us today. More recently, the concept of nature versus nurture has been used in the gay, homosexual, and bisexual community. While many argue that sexual preference is a decision made based on sexual exposure and experiences, others argue that people are born that way. The idea is that they are born with the "gay gene" and have no control over their sexuality. While sexuality is currently the “hot” topic of the nature versus nurture concept, the makeup of killers and mass murderers has long been part of this back-and-forth debate. Are people born to kill? If you believe in the theory of evolution, then as animals it is entirely possible that we are born to kill by nature, because killing is a trait of survival ability. On the contrary, if you believe in the Church and the idea that man was created by God, that would mean that we must be creatures of our environment. In this article, I will discuss a variety of theories and ideologies often used by scientists and psychologists to argue their points of view. I will also discuss and compare different cases involving serial murders trying to find similarities as well as differences...... middle of paper ...... ultimately leads us to become what we do in life , I also believe that our environment also plays an important role. In life we ​​have choices, it is up to us to decide which paths we will take in life. As long as we have the capacity to decide, it doesn't matter who or what environment we were born into. Works Cited “Aileen Wuornos: The Killer Who Preyed on Truck Drivers.” Adrift in the life of crime — — Library of Crime. Np, and Web. April 28, 2014. “Aileen Wuornos.” Crime and investigation. Np, and Web. April 28, 2014. Bio.com. A&E Networks Television, and Web. April 28, 2014 Curran, Daniel J. and Claire M. Renzetti. Theories of crime. Boston: Allyn and Bacon, 2001. Print “Adopted Child Syndrome: Controversy and Reality.” Following. Np, and Web. April 28, 2014. “Killer Couples.” Gerald and Charlene Gallego — — Crime Library. Np, and Web. April 28. 2014.