James R. Liddle is a technical writer with 11 years of professional writing experience. He received a Master of Arts degree in Experimental Psychology, specializing in evolutionary psychology, from Florida Atlantic University in 2014. His primary areas of interest and expertise are the evolution of religious beliefs/behaviors and teaching evolutionary psychology. Todd K. Shackelford is Distinguished Professor and Chair of the Department of Psychology at Oakland University in Rochester, Michigan., where he is Co-Director of the Evolutionary Psychology Lab. He received his Ph.D. in evolutionary psychology in 1997 from the University of Texas at Austin. Much of Dr. Shackelford's research addresses sexual conflict between men and women, with a special focus on men's physical, emotional, and sexual violence against their intimate partners.