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David is a writer and broadcaster with a deep interest in the spiritual and digital dimensions of tikkun olam, ‘healing the world’.

Paul Fletcher is a psychiatrist and a Professor of health neuroscience at Cambridge University. He’s interested in researching psychosis, hallucinations and delusions and was a consultant during the development of Hellblade: Senua's Sacrifice.

Jack Skirianos, reached out for help on Reddit ten years ago when he had run out of anti-rejection drugs that were keeping his kidney functional. He returns now to talk about how he has witnessed the internet and its ability to be a force for good change over the last decade.

Gillian Sandstrom is a Senior Lecturer in the Psychology of Kindness at the University of Sussex, and Director of the Sussex Centre for Research on Kindness. Despite being an introvert, she has become quite addicted to talking to strangers. She has been doing research for a dozen years on the benefits of minimal social interactions, and the barriers that prevent people from connecting. 

Sander van der Linden is Professor of Social Psychology in Society in the Department of Psychology at the University of Cambridge and Director of the Cambridge Social Decision-Making Lab. Before coming to Cambridge, he held posts at Princeton and Yale University. His research interests center around the psychology of human judgment, communication, and decision-making. In particular, he is interested in the influence and persuasion process and how people gain resistance to persuasion (by misinformation) through psychological inoculation. He is also interested in the psychology of fake news, media effects, social networks, and belief systems (e.g., conspiracy theories), as well as the emergence of social norms, attitudes and polarization, reasoning about evidence, and public understanding of risk and uncertainty. His research spans from social psychology to cognitive science using a variety of techniques, from virtual reality to survey and lab studies to computational social science and large-scale (online) interventions.