Some opinions on what is happening and the future.
I recall reading someone's opinion that a land mass the size of Australia could grow enough food to feed the world's current population. The problem is a general lack of efficiency and the distance between the food and the consumer. Now the trend is going back towards local self sufficiency.
Another victory like that and we're done for
— Pyrrhus King of Epirus after his defeat of the Romans at Heracle in 280 BC