In a world worried about looming food shortages triggered by the climate crisis, the collapse in rice prices ¡ª which recently approached their lowest in 18 years ¡ª is evidence that interventions by governments and modern agricultural methods may save the day.

The key is productivity: more food from fewer farmers.

When we think about technological advances, what comes to mind are the internet, smartphones and now the arrival of artificial intelligence. But farming has enjoyed a dramatic and often overlooked productivity revolution: Over the last century, crop yields have exploded.