Tools made out of metal helped the farmers. They could clear more land and grow more crops. There was more food and more free time to do their other things. Metal tools helped craftsmen to make better things. Better furniture, cooking things and jewellery made life more comfortable, specially for the rich people.
Metal weapons made war more dangerous. Metal work needed clever craftsmen. Most craftsmen did not work on the land any more. They lived near one another in one place. This helped new towns to grow.
Many parts of the world did not have any metals, but everyone wanted them. People began to trade more. They also made wars to conquer the lands where metals were found.
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