In Roman law, the management or conduct of another person's affairs without their authorization.
From Latin gestio, derived from gerere (to carry, conduct, manage). The term entered English legal vocabulary through the study of Roman law traditions.
Gestio is a surprisingly modern concept—it's the legal principle behind why your neighbor can fix your broken gutter during a storm without asking permission, and you still owe them money. It's formalized in most Western legal systems under the name 'negotiorum gestio.'
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