How did the atomics arms race between the u. s. and soviet union begin?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

The incas used quipus to options -preserve there history -keep records of people and goods -decide when to plant crops -decide work amoung peasant familys

Brainliest asap!me : ) has anyone read the poem, no, love is not dead? ? i have a question about it .. : )