The bombing of Hiroshima by the United States on August 6,1945,is believed to have divided the 20^th century into two distinct periods.According to the textbook,the first period may be called:

Question

Quizplus · Accepted Answer

The era of naïve optimism is the correct answer because the bombing of Hiroshima marked the end of the era of naïve optimism and the beginning of the era of mass destruction.

The Bombing of Hiroshima by the United States on August