Final answer:
Franklin D. Roosevelt is the author of the quote "The only thing we have to fear is fear itself," from his 1933 inaugural address. The speech aimed to rally Americans against the Great Depression with Moley as his speechwriter at that time.
Step-by-step explanation:
The author of the quote, "The only thing we have to fear is fear itself," is Franklin D. Roosevelt. This famous line was a part of his inaugural address in 1933. During this speech, Roosevelt aimed to encourage Americans to face the difficulties of the Great Depression with determination and collective effort, rather than with fear and passivity.
The use of this quote in the speech highlighted a dire situation that the country was facing at the time, which was the economic depression, and Roosevelt's agenda for recovery. His speechwriter, Moley, helped craft this powerful message that remains well-known to this day for its inspirational quality.