What are the difference between people's attitudes towards immigration during the late 19th century and early 20th century?

What was gained through the gadsden purchase

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons

What are new social classes emerged due to advancement in agriculture ?