Imagine three kids running around a maypole, forming a chain with their arms. The innermost kid is holding the pole with one hand. The faster they run, the more centrifugal force there is tearing the chain apart. The tighter they grip, the more centripetal force there is holding the chain together. Eventually centrifugal force exceeds centripetal force and the chain breaks.
"The Retreat to Tribalism" is from the January 01, 2018 Opinion section of The New York Times. It was written by David Brooks and narrated by Keith Sellon-Wright.