Steve's new book, Enlightenment Now, and Bob's critique ... Cognitive biases that undergird tribalism ... Bob wants to crowdfund a meditation retreat for Steve, who is uncooperative ... How Al Gore’s climate change activism may have hurt his own cause ... Is it crazy to suspect that there’s a larger purpose unfolding through the workings of nature? ... Has our growing grasp of computation and cognition made consciousness less mysterious or more so? ...