Machines were being used on farms around this time, so less people on farms were needed. So these people moved to cities for work.
Hope this helped :)
Answer: It was the population policy of the 21st century.
When 20th century ends, the desirable social goal was sustained and broadly accepted from local and regional levels to the world. To most citizens of America, the population is not really an issue, but it has been for the past decades because low population may mean demographic issues.
Explanation: mark me brainliest please
add a picture please ! there is none available
What? Uhh.
I guess Herbert Hoover.