Final answer:
David Ben-Gurion, the first Prime Minister of Israel, signed Israel's Declaration of Independence.
Step-by-step explanation:
The leader who signed Israel's Declaration of Independence was David Ben-Gurion. He was the first Prime Minister of Israel and served in that role from 1948 to 1963. Ben-Gurion played a crucial role in the establishment of the State of Israel and was a key figure in the Zionist movement.
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