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That's 200 years. Consider how US society has changed in the last 200 years.
by spacehome 10y ago
That's 200 years. Consider how US society has changed in the last 200 years.
- partycoder 10y agoThe last 200 years are special. We've gone from 1 billion to 7 billion people. It's hard to compare that with a period of time when there were only ~200 million people.