At least for Germany it appears we produce 89% of the food we consume[1]. Assuming we have enough calorie rich foods in that percentage (e.g. potatoes and wheat

At least for Germany it appears we produce 89% of the food we consume[1]. Assuming we have enough calorie rich foods in that percentage (e.g. potatoes and wheat are grown locally, rice and corn probably not), we would easily be able to survive or even thrive on 89% of the calories. Looking into the details of [1] we overproduce potatoes, pork, milk and cheese. These are all highly calorie dense, and if we mandated more vegetarianism we could get a lot more calories out of the same arable land. The question is mostly how hard we'd be hit by the immediate effects that caused the global food shortage. People might need to adapt to different/fewer vegetables, but the average BMI tells me that we're way over the caloric needs currently. Germany is also one of the more densely populated countries. [2]. [1] https://de.statista.com/statistik/daten/studie/659012/umfrage/selbstversorgungsgrad-mit-nahrungsmitteln-in-deutschland/ https://de.statista.com/statistik/daten/studie/659012/umfrag... [2] https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_population_density https://en.wikipedia.org/wiki/List_of_countries_and_dependen...