The primary difference between barter and currency systems is that a currency system uses an agreed-upon form of paper or coin money as an exchange system rather than directly trading goods and services through bartering.
If Rome was defeated at the battle of Zama then there wouldn't have been a Roman empire after that, and Carthage would have won the second punic war, leading too the destruction of Rome itself
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History, government, sociology and economics.
Answer:
Newton discovered the laws of gravity, motion, & created a new branch of mathematics - calculus. He discovered gravity, this is the calculus branch of mathematics. Isaac Newton changed the way we understand the Universe. Revered in his own lifetime, he discovered the laws of gravity and motion and invented calculus. He helped to shape our rational world view. But Newton's story is also one of a monstrous ego who believed that he alone was able to understand God's creation.
Explanation:
