The joint rule or government of two or more people who share power equally or as partners.
From 'co-' (together) + 'regency' (from Latin 'regens' ruling, from 'regere' to rule, + '-cy' noun suffix). Used since medieval times to describe shared power arrangements.
Coregencies are actually common in history—ancient Egypt had pharaohs who ruled jointly with heirs to ensure stability, and medieval kingdoms sometimes had coregents managing different territories, showing that power-sharing is an age-old strategy.
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