Definitions for "Instigate"
Keywords:  incite, provoke, goad, unrest, riot
To goad or urge forward; to set on; to provoke; to incite; -- used chiefly with reference to evil actions; as, to instigate one to a crime.
provoke or stir up; "incite a riot"; "set off great unrest among the people"
serve as the inciting cause of; "She prompted me to call my relatives"
Keywords:  happen, event, someone, causes
someone who instigates an event causes it to happen.