Answer: Models are limited by the science—the more that was discovered, the better the model could be made.
Explanation:
At some point in history the well known early civilisations all thought that the Earth was flat. This includes Greece, India, Israel and even China with China only ceasing to believe such as recently as the 17th century. This is because that was what the science of the time led them to believe and so they made models of the Earth based on what they thought was true.
As time went by however and evidence was discovered by scientists and philosophers such as Aristotle that the world was round, the models began to change to depict a Spherical Earth.
This proves that models are simply a reflection of the science of the time and the more things are discovered, the more the Science gets more accurate enough to make better models.
The war fell sharply along the lines of President Truman’s Containment policy. It was the countries mission to prevent the further proliferation of Communism by the Soviet Union
Common Sense by Thomas Paine was highly instrumental in convincing the colonists that they should separate from Great Britain, since it called into question the idea that such a vast and prosperous land should need the support of a small island nation (Britain).
Lincoln did not attend high school. Rather, he had about eighteen months of formal schooling before heading out on his own. From that point onward he was self taught. Hope this helped a bit :)