TED Radio Hour

For the first time in history, more than half the world's population lives in cities. What draws people to them? What changes when people live closer together? Investigating the future of our urban zones, and what cities offer toward a sustainable future.

Understanding where ideas come from can help us harness the power of our thoughts. In this hour, we look at what happens when ideas interact and procreate, then at how to broaden our approach to cultivating ideas from the quieter voices in the room.

How are we inspired? Describing the creative process can be a real challenge. In this hour we'll hear from TED speakers — a poet, a novelist and a singer/songwriter — who explore how the initial inkling of idea becomes a fully formed work of art.

We depend on rules, guidelines and laws to provide structure, order and function, but too often these systems fail us. Here's a look at how trust and practical wisdom could mend education, medicine and the law. Plus, can games solve real world problems?