Final answer:
Carnegie was describing the period before the Industrial Revolution when social structures were shifting towards capitalism.
Explanation:
The period being described by Carnegie is:
- The time before the Industrial Revolution when social structures were transitioning from feudalism to capitalism.
This era witnessed:
- The emergence of modern society and the rise of industrial capitalism leading to major societal changes.
Key figures like Rockefellers and Vanderbilts:
- Established new power dynamics shifting away from the aristocracy to business elites.
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