Every year, Nudgestock brings the world's best behavioural science to your screen for free. This year, we're asking you to put a value on it. And donate that value to one of our selected charities.

This year's fundraiser is also a personal one.

Sam Tatam was the head of behavioural science at Ogilvy, the author of Evolutionary Ideas, and for many years, the heart and host of Nudgestock. He passed away from cancer in August 2025, aged 39.

Sam spent his career making big ideas matter. Donating today is how we do the same.