When a society undergoes slow change, its younger members find great value in the advice of its older members.
Conclusion (thus)
We can measure the rate at which a society is changing by measuring how much deference its younger members show to elders.
Evidence
In times of slow change, young people find great value in the advice of older people. In times of rapid change, young people do not value the advice of elders.
Evaluation
Part of how this argument is laid out feels like a False Choice: the author considers two extremes without thinking about the middle ground. What happens in terms of medium change? The author only covered what happens in terms of slow vs. rapid change. Another potential issue is the language shift between vs. .
Are those equivalent concepts? Not really. I could show deference to my elders whether or not I valued their advice. Deference means "respect". I can outwardly nod and look respectful while inside thinking, "What do you know, you old coot?" Goal
Look for something connecting "how much you value advice" to "how much deference you show", or something dealing with what happens during periods of intermediate change.