Conflict arises from perceived incompatibilities between parties and can be exacerbated by social dilemmas, competition, injustice and misperception. Key causes of conflict include pursuing self-interest at the expense of others in social dilemmas, win-lose competition fostering negative views of opponents, perceived inequity in outcomes, and biases that lead parties to see themselves positively and opponents negatively. Peace can be achieved through contact between parties, cooperation on shared goals, open communication to find mutually agreeable solutions, and conciliation where one party makes unilateral concessions to build trust.