Which era spans from 1945 to the present?

How do goods differ from services? (economics)

The 18th amendment banned the selling of alcohol and contributed to organized crime. true or false

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?