To increase production output during the industrial revolution, businesses primarily invested in what?

What triumphs did the late 19th century witness in the realms of industrial growth, urbanization, and technological innovation? what challenges did these developments pose for urban dwellers, workers, and recent immigrants? how did city officials and everyday citizens respond to these challenges?

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

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