Only when benefits are shared equally can a partnership last.
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history
Originally a phrase from 19th-century unequal treaties: the 'most-favored-nation' clause giving each Western power the same concessions in Qing China (英国一律均沾 from the 1843 Treaty of the Bogue).
usage
Modern usage has stripped the imperial-era baggage — now mostly refers to fair profit-sharing in business or joint ventures.
