It's hard to stay hopeful sometimes. Things can look pretty bleak and divided, especially around election time. But if you're losing hope in your fellow humans, stop and listen to the science. Other people are kinder, friendlier and more co-operative than you might think.    Using insights from his new book Hope for Cynics: The Surprising Science of Human Goodness, Stanford's Jamil Zaki joins Dr Laurie Santos for a special season to show why we shouldn't be so cynical about our fellow citizens and why being more open and trusting can help us live happier and healthier lives.  The series begins Sept 9. See omnystudio.com/listener for privacy information.