Well, sadly, it is effective when it doesn't result in disaster.
Brinksmanship refers to the negotiation practice of letting a situation edge right up to disaster before finding a solution.
It is, however, wildly irresponsible, shortsighted, and often leads to people getting hurt and unnecessary stress.
Answer:
The war started mainly because of four aspects: Militarism, Alliances, Imperialism and Nationalism. This is because big armies become potential threats to other countries, other countries started forcing alliances in order to secure land.
Explanation:
Hope this helps! :)