In which year was the U.S. Constitution ratified?

The U.S. Constitution was ratified in 1787, which is a significant event in American history. After the Constitution was drafted at the Constitutional Convention in Philadelphia in that year, it was sent to the states for ratification. Ratification was a crucial process because it required approval from nine out of the thirteen states to become law. This process led to a series of debates and discussions known as the Federalist Papers, where the merits of the Constitution were argued. Ultimately, the Constitution became effective on March 4, 1789, after sufficient states had ratified it, establishing the framework for the federal government and outlining its powers and limitations. Understanding this timeline is key to grasping the development of American governance and constitutional law.