Al Smith's new play Rare Earth Mettle at the Royal Court is a meaty piece that covers a lot of ground, ironic considering the central premise is about the fight for control over one piece of land.
In Bolivia, Kimsa (Carlo Albán) scratches a living showing tourists around the remnants of colonial silver mines, including a British train, but the land he lives on is rich in the rare and valuable mineral lithium.
Billionaire Henry Finn (Arthur Darvill) wants to buy the land to mine the lithium for batteries for his new range of electric cars. Anna (Genevieve O'Reilly) is a doctor who wants the lithium because research tentatively shows that lithium helps improve mental health.
And Nayra (Jaye Griffiths) wants to use it for political (and financial) gain.
On the surface, there is something inherently good about all their motives - green cars, better health and a leader who wants to make life better for indigenous people.
But as the play unfolds, those motives are increasingly tarnished by the devious, corrupt and illegal means they'll go to reach their end goals.
If the play was focused purely on the debate over good motives badly executed, it would make for a really interesting and provocative play, particularly given the sharp wit and humour that weaves through it - more of that in a moment.