Final answer:
Ancient Egypt did not significantly influence the creation of American democracy.
Step-by-step explanation:
The nation's system of government that did not significantly influence the creation of American democracy is D) Ancient Egypt.
Ancient Rome, Ancient Greece, and Mesopotamia all played important roles in shaping American democracy. The Greeks introduced the idea of democracy, while the Romans developed the concept of representative democracy. Mesopotamians contributed to the development of laws and political organization.