<span>swift rivers provided power for machines</span>
I am going to presume after the ww2 bombs were dropped on Hiroshima and Nagasaki you mean. in that case the Japanese had to become allies and japan was changed to a democratic state under the power of their allies. popular culture dominated although traditional arts continued.
The ancient civilization is the Indus valleyy<span />
Growing influence from Western nations.
I feel like the tossup states were probably Florida, North Carolina, Georgia, Texas maybe (demographic shifts is why), Arizona, Nevada, Iowa, Ohio. (The characterization for these states differed among sources though)