What’s the importance of natural or vegetative growth for demographics??

mass production/ assembly line production

d: social contract theory

"a shortage of traditional labor created new opportunities in the workplace. a major cause of the internment of japanese americans during world war ii was. racial prejudice. in the early 1940's, the "destroyers-for-military-bases deal" with great britain and the lend-lease act were evidence that the united states."

england is crowded cold and polluted while north america was like the opposite