Peter Zehan is the best explaining geopolitics.
Basically some of the 3rd world s regional  population have expanded
its population as much as SEVEN TIMES what it  can feed from its local
farmers.  When, not if the global trade in food stops, these people
starve
https://www.youtube.com/watch?v=chKYMM7dFbU&ab_channel=ZeihanonGeopolitics