I would say it is pretty fragile, half the worlds population is completely dependent on artificially produced fertilizer and unsustainable agricultural practice

I would say it is pretty fragile, half the worlds population is completely dependent on artificially produced fertilizer and unsustainable agricultural practices to source their food. And its not that we don't have enough arable land to produce the food we need otherwise and far more sustainably, it is just less profitable so we don't do that. And if shit does hit the fan its not like we can reopen 50% more farmland within just a few years that hasn't been used in a decade or more and is overgrown with trees and shrubs. Plus a lot of the old farmland has been depleted before being abandoned and it takes many decades, usually around 75-150 years, to build the soil back up to previous topsoil depths, which also means dealing with reduced yields and sacrificing yield and fertilizer to the soil until it is.