Fire helped to bring light during the night, it brought warmth during the cold seasons and could cook food. Helping to make permanent civilizations because they didnt have to migrate when it is cold.
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Throughout history language has done a great job of uniting people, since they are able to communicate and share stories that bring them closer together. It has also divided, however, since people who speak a certain language can sometimes feel a sense of national or ethnic pride that leads to violence against people who speak other languages.
The Ice Age had a great effect on where people settled in americans since they were only able to reach North America through the Bering Land Bridge, which was only frozen due to the extremely low temperatures. Without this they would have had no way to leave Siberia.
The great depression started because of a stock market crash. meaning economy will go down quickly. As companies started losing money they could not pay there employees enough. Employees then started quitting there jobs or low food supply made them hungry tired and weak. For the survivors that needed money had to get jobs though it was difficult because companies could not pay enough. People had to grow there own crops and get there own water to survive.