Mark A. Williams is a professor of cognitive neuroscience with over 20 years experience conducting behavioral and brain imaging research focusing on social skills. He has published more than 70 scientific articles and received numerous high-profile fellowships and grants. Williams now runs programs for schools and businesses on the neuroscience of learning and emotions, as well as the impact of modern technology on our brains. He has made many TV and radio appearances to discussed topics including facial expressions, emotions, racism, and even why we can’t tickle ourselves. His research on which much of this book is based was featured in outlets globally including The New York Times, The Economist, The Guardian, and New Scientist.