We often view paradise as a place of safety, beauty, tranquility. It's an ideal we long for, but one we can rarely find. This hour, TED speakers search for utopia and come to terms with reality. TED Radio Hour+ subscribers now get access to bonus episodes, with more ideas from TED speakers and a behind the scenes look with our producers. A Plus subscription also lets you listen to regular episodes (like this one!) without sponsors. Sign-up at: plus.npr.org/ted