Welcome to the "Stop Bullying in the Workplace" video series! Workplace bullying happens when an employee is the target of a pattern of mistreatment that causes or is intended to cause some sort of harm. In this video lesson, we'll take a look at the ways that bullying harms the target, bystanders, and the culture and effectiveness of an organization. Make no mistake: in the workplace, the root cause of bullying is weak leadership. The only valid response to bullying is zero tolerance.