When the author of "Too Many Bananas, Not Enough Pineapples, and No Watermelon at All: Three Object Lessons in Living With Reciprocity" thought that his family had too many bananas, he was advised by the leader of the village to:.

feed his guests bananas when they were hungry

Explanation:

Based on the scenario being described within the question it can be said that  he was advised by the leader of the village to feed his guests bananas when they were hungry. In order to use the bananas that were left by the family and not allow them to rot instead of feeding the guests other food that the family may eat.

unless they converted, many non-christians (mainly jews and muslims) were persecuted

imperial crisis leads to civil war.

roman forces withdraw from britain as goths attack rome.

odoacer topples romulus augustus

huns attack the empire and drive german peoples ahead of them.