The urge to be accepted by the tribe and to conform to societal norms is powerful. It is this ancient characteristic that has kept humanity alive throughout our most dangerous and treacherous prehistoric past. At those times conforming to the tribe was a matter of life or death as very few people could survive on their own. All this has changed with technological development and the Industrial Age. We are now no longer so weak and dependent on each other. We can work to earn money to purchase the labor of other skilled artisans. We do not have to be 100% self-sufficient. Indeed this is one reason that humanity has been able to lift itself out of poverty.
“If goods do not cross borders, soldiers will.” Frédéric Bastiat