upheaval used in Zen and the Art of Motorcycle Maintenance
only 1 use
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a state of violent disturbance and disorder (as in politics or social conditions generally); or: a violent disturbance; or: (geology) a rise of land to a higher elevation (as in the process of mountain building); or: disturbance usually in protest
The book also appeared at a time of cultural upheaval on the matter of material success.
Afterward (28% in)
There are no more uses of "upheaval" in Zen and the Art of Motorcycle Maintenance.