Flevoland, the Netherlands, 1968. A new patch of land is being carved out of the sea. Destined initially for agriculture or industry, when nature begins to take over, authorities decide to protect the new Earth as a nature reserve - the Oostvaardersplassen.

In this episode of Sideways, Matthew Syed uses the story of this pioneering nature reserve to reveal our conceptions, and misconceptions of the wild.

Rich with reedbeds, the oostvaardersplassen soon becomes a haven for rare birds. But Dutch ecologist Frans Vera wants to take the oostvaardersplassen further. He wants to test the theory that Europe wasn’t covered with forest before humans arrived, but instead had vast grassy plains, much like the savannas of Africa. And so begins the introduction of herds of cattle, horses and deer to the reserve - a pioneering environmental effort which pre-dates the now familiar idea of rewilding.

But when the project stumbles into controversy, it tests our understanding of the wild and how we look after it. And as opposition to the Oostvaardersplassen begins to shape its future, the heady dream of a self-sufficient Dutch serengeti is abandoned. With the urgency of restoring the earth’s natural spaces, Matthew questions whether our scientific failures can still lead to progress.

With journalist and environmental campaigner George Monbiot, cultural geographer Dr Clemens Driessen and environmental philosopher Dr Andrea Gammon along with Frans Vera and campaigner Betty Den Engelsman.

Producer: Pippa Smith