Compared to us, people who lived a century ago had very few diversions to amuse them.
Conclusion (Therefore)
People a century ago probably read much more than we do today.
Evidence
People who lived a century ago had few ways to amuse themselves than we do today.
Evaluate
The author is definitely assuming the Linking idea of, "If fewer diversions, then more reading".
If we were trying to argue the Anti-Conclusion we'd be thinking,
Given that ... people 100 years ago had fewer ways to amuse themselves,
How can we still argue that ... people 100 years ago read just as much (or less) than they do today?
We might say most of them weren't literate, so they couldn't read. Or they didn't have access to books. Or they didn't enjoy reading.
We might say that the diversions they did have available to them (like fishing or baseball) were obsessions that ate up all their time.
We might say that nowadays, even though we have a much bigger number of options for how to amuse ourselves, we still gravitate mainly toward reading.
Goal
Look for a way to argue that people from a century ago didn't read that much, people nowadays read a ton, or "fewer diversions ≠ more reading".