As Rome expanded, the people they conquered became their subjects. As such, the sheer size of Rome and the vast number of people (all of which came from different cultures with different religions and languages) made it hard for the government to successfully rule.
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The available evidence suggests that immigration leads to more innovation, a better educated workforce, greater occupational specialization, better matching of skills with jobs, and higher overall economic productivity. Immigration also has a net positive effect on combined federal, state, and local budgets.
Explanation: