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1973–1974 — The United States is affected by the Arab Oil Embargo; gasoline prices skyrocket as supplies of gasoline and heating oil are in short supply. In response, daylight saving time is started in January (nearly four months earlier than usual), and the national speed limit is lowered to 55 mph.
Timeline of pre–United States history; Timeline of the history of the United States (1760–1789) Timeline of the history of the United States (1790–1819) Timeline of the history of the United States (1820–1859) Timeline of the history of the United States (1860–1899) Timeline of the history of the United States (1900–1929)
The Constitution of the United States was drafted and ratified, and it came into force on March 4, 1789. [20] The Constitution established a presidential system with separation of powers and three branches of government that are still in use today.
July 5 – Right to vote: The Twenty-sixth Amendment to the United States Constitution is formally certified by President Richard Nixon, lowering the voting age from 21 to 18. July 19 – The South Tower of the World Trade Center is topped out at 1,362 feet (415 m), making it the second tallest building in the world.
The United States Constitution has been a notable model for governance worldwide, especially through the 1970s. Its international influence is found in similarities in phrasing and borrowed passages in other constitutions, as well as in the principles of the rule of law , separation of powers , and recognition of individual rights .
The 1970 United States census begins. There are 203,392,031 United States residents on this day. President Richard Nixon signs the Public Health Cigarette Smoking Act into law, banning cigarette television advertisements in the United States, starting on January 1, 1971. American Motors Corporation introduces the Gremlin.
The United States Constitution has served as the supreme law of the United States since taking effect in 1789. The document was written at the 1787 Philadelphia Convention and was ratified through a series of state conventions held in 1787 and 1788.
Timeline of the development of American political parties and the various party eras. Political eras of the United States refer to a model of American politics used in history and political science to periodize the political party system existing in the United States. The United States Constitution is silent