Things once certain now seem shaky. Liberal democracy, once on the ascendancy, now appears to be in deep trouble. Nationalism and tribalism are on the rise. Three global threats challenge human existence: climate change, nuclear disaster and the rapid surge in artificial intelligence/biotechnology. In his book 21 Lessons for the 21st Century, Yuval Harari explores these questions and more: challenges of technology and politics, questions of hope and despair. In this small-group discussion class, we will review and discuss these lessons and decide if he has identified the truly critical issues. Recommended textbook: 21 Lessons for the 21st Century by Yuval Noah Harari (2019), ISBN: 978-0525512196.