Comment nourrir tout le monde

Once upon a time there was a distant planet in a far-flung corner of the galaxy. A boisterous and chatty little species came into being there one day and immediately thrived, to the extent that there were around 6 billion of them by the early 21st century! This species decided to call itself Humans. So, anyway, these Humans shared the resources of this planet they called Earth as best they could, which wasn't very well to tell the truth, because out of that total of 6 billion, 850 million humans suffered from severe under-nourishment.