Final answer:
War occurs despite the logic of mutually beneficial agreements due to scarcity, political ambitions, fears of weakness, political consequences, and the difficulty of acknowledging sunk costs. Negotiations can fail due to strategic deceptions and cognitive biases.
Step-by-step explanation:
The primary reason why war still occurs, even when it seems logical to reach agreements that make both sides better off, is due to complex factors like scarcity of resources, differing political ambitions, and cognitive biases that impact decision-making during conflicts. The desire for scarce resources, such as clean air, potable water, and territory with specific advantages, often leads to conflict. Political leaders may also refuse to end wars due to fears of appearing weak, beliefs in eventual victory, or concerns about political repercussions, such as the growth of opposition parties. Furthermore, once a war has started, the sunk costs of the conflict can cloud judgments, making it harder for leaders to justify peace without achieving their initially stated objectives, which could include defending national interests or deterring future aggression.
Negotiations and political bargaining are common methods to resolve conflicts, but these can fail when leaders believe that war is the only way to protect their interests or when peace talks are used as strategies for further military advantages. Additionally, cognitive biases like overestimating one's chances of success or underestimating the enemy can lead to continued warfare, despite potential agreements that could benefit all parties involved.