How can you change the world? Join Krishnan Guru-Murthy and his guest of the week as they explore the big ideas influencing how we think, act and live.

Listen to some of the best bits from the series, hosted by David Mitchell, Jimmy Carr, Charlie Brooker and Lauren Laverne. Each week the team cover the world’s most pressing news items, joined by guests from the worlds of comedy, politics, science and culture. Watch it live on Channel 4 every...