In general if you were to take away synthetic fertilizers and rely only on traditional agriculture without over-pumping water from aquifers you start to realize

In general if you were to take away synthetic fertilizers and rely only on traditional agriculture without over-pumping water from aquifers you start to realize that the population of planet earth is only possible to sustain at its current levels with the current system and if/when parts of that start to go away then some of the people start to go away too. The current situation highlights the reliance also on global supply chains functioning properly. These are fun times.