Where did countries and national identity come from; are nations the most natural and effective way to organise large groups of people, or are they just a little bit idealistic and somewhat impractical?

Or, as John Lennon once suggested, would it be better if there were no countries….

With Choctaw tribal leader Waylon Gary White Deer; behavioural scientist Dr. Gad Saad at Concordia University, Canada; Sinisa Malesevic, professor of sociology at UCD, Ireland; historian and writer Diana Muir Appelbaum; social and political theorist Kevin Carson.

Broadcast on RTÉ Radio 1, Ireland.