// Book comparison
The Age of Spiritual Machines vs Misbehaving
Which should you read? A side-by-side comparison of The Age of Spiritual Machines by Ray Kurzweil and Misbehaving by Richard H. Thaler.
The Age of Spiritual Machines
by Ray Kurzweil
★ 4.9/5
Misbehaving
by Richard H. Thaler
★ 4.9/5
At a glance
| The Age of Spiritual Machines | Misbehaving | |
|---|---|---|
| Rating | ★ 4.9/5 | ★ 4.9/5 |
| Pages | 400 | 432 |
| Reading time | ~10.0 h | ~10.8 h |
| Published | 1999 | 2015 |
| Author | Ray Kurzweil | Richard H. Thaler |
| Category | Innovation & Technology | Finance & Investment |
| Publisher | — | — |
Choose The Age of Spiritual Machines if…
- → You're interested in innovation & technology.
- → You want the higher-rated book (4.9/5).
- → You prefer a shorter read (~10.0 hours).
Choose Misbehaving if…
- → You're interested in finance & investment.
- → You want the more recent perspective (2015).
Key takeaways — The Age of Spiritual Machines
- ✓ Develop empathy for non-biological systems — the substrate matters less than the structure of intelligence itself.
- ✓ Embed spiritual and ethical values into your technology roadmap so future AI products carry meaning, not just capability.
- ✓ Recognize that the pursuit of digital immortality is the modern expression of an ancient human search for permanence — and a powerful market force.
Key takeaways — Misbehaving
- ✓ Design pricing and incentives around loss aversion — people will work roughly twice as hard to avoid a loss as to capture an equivalent gain.
- ✓ Use default options as your most powerful behavioral lever; whatever you set as the default will dominate, regardless of how trivial it seems.
- ✓ Recognize mental accounting in your customers and employees — money is not fungible in their minds, and your offer architecture should reflect that.
The verdict
If you want the higher-rated, shorter read, start with The Age of Spiritual Machines. If you specifically need finance & investment, Misbehaving is the better fit. Both summaries are free — no signup required.
❓ FAQ
Is The Age of Spiritual Machines or Misbehaving better? +
The Age of Spiritual Machines has the higher reader rating (4.9/5 vs 4.9/5), but "better" depends on your goal. The Age of Spiritual Machines focuses on innovation & technology, while Misbehaving focuses on finance & investment. See the verdict below.
Which is shorter, The Age of Spiritual Machines or Misbehaving? +
The Age of Spiritual Machines is shorter (400 pages, ~10.0 hours) compared to Misbehaving (432 pages, ~10.8 hours).
Should I read The Age of Spiritual Machines or Misbehaving first? +
If you want the quicker, higher-rated read, start with The Age of Spiritual Machines. Otherwise read whichever matches your current goal — both summaries are free on BookHubs.