What major contribution did Calvin Coolidge make while president
One of Lincoln's major contribution while in office was the Emancipation Proclamation. This began the process of freedom for America's black slaves.
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william H TAFT
John Calvin's major contribution during his tenure in Geneva was the establishment of a systematic and influential framework for Reformed theology. He emphasized the sovereignty of God, the authority of Scripture, and the doctrine of predestination, which shaped Protestant thought. His seminal work, "Institutes of the Christian Religion," provided a comprehensive guide to his theological views and helped to solidify Calvinism as a major branch of Protestantism. Additionally, he implemented a model of church governance that influenced the structure of Reformed churches worldwide.
The War on Poverty and the Civil Rights Act of 1964
You must clarify the question. Which George Bush - there were two of them who were both president.
He is remembered for being a civil war general. His presidency is insignificant.
Calvin Coolidge
Penicillin was discovered and the Tea Pot Dome Scandal
No. He lived almost four years after he left office.
Washington was the first President of the US. The whole idea of electing a chief executive for a fixed term with clearly delimited powers was a truly radical concept. Washington created the role of President, defined the office and made it work. After 8 years, he happily yielded power to the new President. Such was his biggest contribution in office.