When a group of people join together for a common cause, there is a lot of emotion involved. Sometimes it stems from your children being involved, an investment of your time or money, and mostly because you are passionate about the same thing. Unfortunately when emotion and relationships are involved there can be conflict.
Some areas of conflict can be dealt with through the development of strong policies and procedures about the business of the organization, but in many cases the conflict arises from a relational difference. There can be a disagreement between executive or board members, between staff and board, between the board and other volunteers, or amongst the members. Being aware of conflict and having a degree of knowledge will help you assess the situation and de-escalate problems.
Managing Conflict - A Guide to Volunteer Boards: Non-Profit Sector Leadership Program, Dalhousie University
Managing Board Conflict: Non-Profit Sector Leadership Program, Dalhousie University
http://www.orgwise.ca/sites/osi.ocasi.org.stage/files/resources/Managing Board Conflict.pdf
Can Conflict in Non-Profits be Managed Successfully?: Elisabeth Seaman, Learn2Resolve
Conflict Within your Non-Profit - Handle with Care: Foundation Group