With the end of World War II, the US lived a moment of prosperity. North Americans used the money they collected during the war to buy goods that were not available during the conflict. There was a large birth rate due back from the soldiers to their homes and with the increase of the economy unemployment fell a lot.
There were several social changes in the following years, among which we can mention the increase in the minimum wage, the expansion of social insurance and the foundation of the energy department.
However over time the high expenses with social programs and the country's involvement in the Vietnam War generated great inflation in the 70's, with this the economy suffered a fall and there was increase in unemployment and instability in the income of the country
. Under Reagan's rule, inflation was gradually reduced and controlled, unemployment declined, but the federal budget deficit grew sharply in the 1980s, causing the country's trade balance to worsen and there were more imports than exports.
The post-war period was also marked by a strong civilian movement where various social groups, especially blacks, sought equal treatment before the law and society after suffering decades of discrimination.
Mostly the reasons were economic. The country's economy was dismembered when it entered the great depression and they had to take care of that. The South used this to reinforce its values because nobody was bothering them since the great depression forced the government to move its focus on something else.
When the United States annexed Texas, the Mexican government decided to cut off diplomatic relations, resulting in the Mexican-American war, in which the Americans defeated Mexico.
Answer:
The Treaty on Open Skies entered into force on January 1, 2002, and currently has 34 party states. It establishes a program of unarmed aerial surveillance flights over the entire territory of its participants.