Answer: Through multiple revolutions, people have adapted to and affected their environments. As civilizations settled, new advances in agriculture and tools were made to allow for a less-nomadic society. Through advances such as iron tools and food stock, civilizations settled creating the basis for large empires to come later. Also through the innovation of weapons and armor, empires were able to better control and defend larger territory allowing for exponential expansion. Finally, with new advances made by different civilizations, trade increased as demand for new products from other empires grew.
Answer:
Living on a boat was easier than traveling on land.
Explanation:
You didn't have to travel by foot.
The alliances are the main reason behind World War 1 because they turned what was meant to be a brief war between accuser and accused into a world war.