It was a change of thinking from 1500 to 1700 when modern science came out as a new was of getting knowledge about the world. It was important because it started modern science.
The french became upset when English colonists began settling in the Ohio River Valley. In 1753 the French in Canada began building forts in the Valley. The French wanted to protect the land from the British. This resulted in the British attacking in self defense. They thought of it as the zfrench preparing to attack. This became known as the French and Indian War in the colonies. Both sides British and French were accompanied by Indian allies
Because the south in large part were built on slaves. They didn't have factories or anything like the north did. They had cotton and assorted vegetables. In large part many will say that is also what lost them the war.