Answer:
The event that sets the main action of the story in motion is the theft of some of Judson's liquor.
Explanation:
The events in Ruthless By William DeMille are triggered as Judson Webb decided to turn his bottle of wine into a poisonous tramp for a thief, as he felt deeply offended for the secret robbery las winter, he sets the events to get his revenge without knowing that the destiny and resolution were going to go in a different direction.