What could be a root cause(s) of negativity in an organization?

Barrett (2014) stated, “The leader or facilitator must address negativity immediately” (p. 298). Consider you are the senior leader of your organization. Respond to the following: What could be a root cause(s) of negativity. When conducting your staff/team meetings, how could you effectively address those individuals who seemingly use your meetings as the time to display negativity. How does your Emotional Intelligence play a part in addressing these individuals. There are several relevant articles to address this issue, so please do your research!