Gilbert Herdt, PhD, is a cultural and psychological anthropologist who specializes in human sexual development, sexual orientation, and sex and gender across cultures. His work in Papua New Guinea and the United States has been published in more than 38 books and 107 scientific papers. Michelle Marzullo, PhD, is a practicing anthropologist, specializing in critical sexuality studies. She is Chair and Professor for the Human Sexuality PhD Program at the California Institute of Integral Studies (CIIS), leading only the second such fully accredited PhD program in the United States. Her work spans academic and practical applications having engaged a wide range of research and consultancy engagements in the realms of public health, diversity & inclusion, policy, higher education, organizational change, and technology.  Nicole C. Polen-Petit, PhD, is a developmental psychologist, specializing in human sexual development and sexual identity. She is currently serving as Interim Associate Dean for the College of Letters and Sciences at the National University, San Diego. Her work spans both academic and community settings, having served in both institutions of higher education and within community mental health organizations serving children and families.