Conflict can arise when basic needs are not met or goals are obstructed. The main causes of conflict include incomplete or inaccurate data, poor relationships and communication, differing values or belief systems, unjust structural systems, competing interests, and limited resources. Conflicts over data often involve disagreements over the best solution, while relationship issues question motives. Differing values make compromise difficult, and structural causes prevent needs from being met. Interest and resource conflicts stem from perceptions of limited options or materials.