The American Century is a characterization of the period since the middle of the 20th century as being largely dominated by the United States in political, economic, and cultural terms. It is comparable to the description of the period 1815–1914 as Britain's Imperial Century. The United States' influence grew throughout the 20th century, but became especially dominant after the end of World War II, when only two superpowers remained; the United States and the Soviet Union. After the dissolution of the Soviet Union in 1991, the United States remained the world's only superpower, and became the hegemon, or what some have termed a hyperpower.
See the Civil Rights Era, from Wikipedia:
The civil rights movement was a social movement and campaign from 1954 to 1968 in the United States to abolish legalized racial segregation, discrimination, and disenfranchisement in the country. The movement had its origins in the Reconstruction era during the late 19th century and had its modern roots in the 1940s. After years of direct actions and grassroots protests, the movement made its largest legislative gains in the 1960s. The social movement's major nonviolent resistance and civil disobedience campaigns eventually secured new protections in federal law for the civil rights of all Americans. The social movement's span of time is called the civil rights era.
See the Space Race, from Wikipedia:
The Space Race (Russian: Космическая гонка [kɐsˈmʲitɕɪskəjə ˈɡonkə]) was a 20th-century competition between two Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between the two nations following World War II and had its peak with the more particular Moon Race to land on the Moon between the US moonshot and Soviet moonshot programs. The technological advantage demonstrated by spaceflight achievement was seen as necessary for national security and became part of the symbolism and ideology of the time. The Space Race brought pioneering launches of artificial satellites, robotic space probes to the Moon, Venus, and Mars, and human spaceflight in low Earth orbit and ultimately to the Moon.
See Second-wave Feminism, from Wikipedia:
Second-wave feminism was a period of feminist activity that began in the early 1960s and lasted roughly two decades, ending with the feminist sex wars in the early 1980s and being replaced by third-wave feminism in the early 1990s. It occurred throughout the Western world and aimed to increase women's equality by building on the feminist gains of the late 19th and early 20th centuries.
See the New Great Migration, from Wikipedia:
The New Great Migration is the demographic change from 1970 to the present, which is a reversal of the previous 60-year trend of black migration within the United States.
Since 1970, deindustrialization of cities in the Northeastern and Midwestern United States, growth of jobs in the "New South" with lower costs of living, desire to reunite with family, cultural ties, the perception of lessening discrimination and religious connections have all acted to attract African Americans to the Southern United States in substantial numbers. Between 1965 and 1970 around 287,000 African Americans left the Southern United States, while from 1975 to 1980, it is estimated 109,000 African Americans migrated to the Southern United States, showing the reversal of the original Great Migration. Between 1975 and 1980, several Southern states saw net African American migration gains. In 2014, African American millennials moved in the highest numbers to Texas, Georgia, Florida, and North Carolina. African American populations have continued to drop throughout much of the Northeast, especially from the state of New York and from northern New Jersey, as they rise in the South. In Massachusetts, even though the black population saw a net increase between 2010 and 2020, the Greater Boston area lost approximately 8,800 black residents and Massachusetts lost an average of 11,700 black residents per year from 2015 to 2020, with approximately half moving to Southern states and Georgia and Florida being the most popular destinations.
African Americans are moving to the suburbs.
Détente (/deɪˈtɑːnt/ day-TAHNT, also UK: /ˈdeɪtɒnt/ DAY-tont; French for 'relaxation', French pronunciation: [detɑ̃t]) is the relaxation of strained relations, especially political ones, through verbal communication. The diplomacy term originates from around 1912, when France and Germany tried unsuccessfully to reduce tensions.
The term is often used to refer to a period of general easing of geopolitical tensions between the Soviet Union and the United States during the Cold War. Détente began in 1969 as a core element of the foreign policy of U.S. president Richard Nixon. In an effort to avoid an escalation of conflict with the Eastern Bloc, the Nixon administration promoted greater dialogue with the Soviet government in order to facilitate negotiations over arms control and other bilateral agreements. Détente was known in Russian as разрядка (razryadka), loosely meaning "relaxation of tension".
See the 1970's Energy Crisis, see Wikipedia:
The 1970s energy crisis occurred when the Western world, particularly the United States, Canada, Western Europe, Australia, and New Zealand, faced substantial petroleum shortages as well as elevated prices. The two worst crises of this period were the 1973 oil crisis and the 1979 energy crisis, when, respectively, the Yom Kippur War and the Iranian Revolution triggered interruptions in Middle Eastern oil exports.