Explanation:
Development has contributed to financial prosperity and has ignited the obvious fate, and it has also led to sectional conflict over slaves. There were a lot of segregationists in the north whereas the south was predominantly pro-slavery, which created sectional friction since each person needs to see both values spread to the west.
Answer: the answer is John Locke
The answer is Galileo, however, a scientist much earlier then Galaleo, named Anaxagoras also discover this. However, I believe credit is given to Galileo.
